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Old 02-07-2014, 08:10 AM   #1
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351 swap question

Hey guys I'm about ready to pick up a 351 for my foxbody at my uncles house just trying to prep everything first so it won't be a hassle. My question is will the 5.0 motor mounts work for the 351 or will I have to get a certain type for it to fit in my foxbody. Any info would be appreciated
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Old 02-07-2014, 02:10 PM   #2
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The mounts will work fine. But if you have a manual then you will need a 28 oz balance flywheel. The 5.0 is balanced at 50 oz. Also, when j did the swap in my 94 I needed a new oil pan to clear the rack and pinion and k-member, the sump was in the wrong area. You will need a 351 intake base because its wider and the 5.0 base won't work. Also need to check hood clearance. Idk about the fox but the 94 stock hood wouldn't clear. I had to get a cowl hood. Your exhaust will also need to be widened where it bolts to the headers.
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Old 02-07-2014, 03:34 PM   #3
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The mounts will work fine. But if you have a manual then you will need a 28 oz balance flywheel. The 5.0 is balanced at 50 oz. Also, when j did the swap in my 94 I needed a new oil pan to clear the rack and pinion and k-member, the sump was in the wrong area. You will need a 351 intake base because its wider and the 5.0 base won't work. Also need to check hood clearance. Idk about the fox but the 94 stock hood wouldn't clear. I had to get a cowl hood. Your exhaust will also need to be widened where it bolts to the headers.
It's a 4 cylinder to 351 swap. I just happen to have some 5.0 motor mounts laying around lol. I haven't got the transmission yet I haven't decided on one I want yet. I knew the hood wouldn't clear I was going to cut room for it bc I have a scoop that should give enough room if not I will just get the cowl. I didn't know about the oil pan not clearing didn't really think of that thanks! Lol I still need the wiring for it so I will add the oil pan too if it doesn't fit. I will "attempt" to put it in maybe next week and see if I get lucky.
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Old 02-07-2014, 04:16 PM   #4
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OK, well I've never done that swap. I would assume that you would need to upgrade the rear end also. But I'm going to end my advise here because I dont want to give false info.
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Old 02-07-2014, 04:51 PM   #5
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You'll definitely want to put an 8.8 in. The 4 bangers came with a 7.5, and that'll break pretty quickly with a 351 in front of it.
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Old 02-07-2014, 05:46 PM   #6
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You'll definitely want to put an 8.8 in. The 4 bangers came with a 7.5, and that'll break pretty quickly with a 351 in front of it.
Yea iv been in search of one for a little while. Need to check the local salvage yards. The Craigslist ones think there made out of gold or something. Do you have any suggestions on what manual transmission I should get? I'd like to have a 5 speed but want something that will hold up
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Old 02-07-2014, 05:55 PM   #7
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Grab a cheap 8.8 and build it, but it sounds like you're on the right path. A stock T-5 isn't gonna do much. You'll have to build it if you want it to handle a modded 351. If you want to stay manual, I'd find a TKO, or build a t-5. Or you could get a decent auto with a manual valve body and a good stall; that'll rock at the strip.
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Old 02-07-2014, 05:58 PM   #8
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A stock T-5 will hold up fine for what your doing. But if your wanting a new transmission I would get a ford racing super duty T-5. They are 1700 brand new.
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Old 02-07-2014, 06:01 PM   #9
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Originally Posted by Roguestang View Post
Grab a cheap 8.8 and build it, but it sounds like you're on the right path. A stock T-5 isn't gonna do much. You'll have to build it if you want it to handle a modded 351. If you want to stay manual, I'd find a TKO, or build a t-5. Or you could get a decent auto with a manual valve body and a good stall; that'll rock at the strip.
I had a 351 in my 94 backed with a stock T-5. I drove the hell out of it for 3 years with no issues ever. I had the edlebrock performer intake, ported stock heads, F-303 can and all the bolt ons. Never had an issue with the trans.
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1989 LX, 306 with TF top end kit, Anderson N-21 cam, TKO 600 trans with steel splatter shield,full Maximum Motorsports Mustang maximum Grip box, Detroit locker rear end with 31 spline Moser axles. Staggered wheels with Nitto 555 315/35/17 out back.
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Old 02-07-2014, 07:14 PM   #10
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I had a 351 in my 94 backed with a stock T-5. I drove the hell out of it for 3 years with no issues ever. I had the edlebrock performer intake, ported stock heads, F-303 can and all the bolt ons. Never had an issue with the trans.
Iv heard both good and bad on T-5s. Iv never owned one personally but I might have one laying around somewhere. If it breaks there's always money to replace it lol
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Old 02-07-2014, 07:20 PM   #11
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Originally Posted by Roguestang View Post
Grab a cheap 8.8 and build it, but it sounds like you're on the right path. A stock T-5 isn't gonna do much. You'll have to build it if you want it to handle a modded 351. If you want to stay manual, I'd find a TKO, or build a t-5. Or you could get a decent auto with a manual valve body and a good stall; that'll rock at the strip.
Yea it's a slow build but I want to take my time and not skip any steps I want to do it right lol iv got a T-5 laying around I might could build. Is the TKO stouter or better built or something? Never heard of it
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Old 02-07-2014, 07:32 PM   #12
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Yea it's a slow build but I want to take my time and not skip any steps I want to do it right lol iv got a T-5 laying around I might could build. Is the TKO stouter or better built or something? Never heard of it
Its a whole lot stronger, and more expensive!! I have one in my car and I love it. But the is an inherent issue with a lot of time. Many of them have a 3rd gear issue and require it to be sent in for carbon fiber synchronizers. Or you can have it face plated which makes it a lot stronger. Thats what I am going to do to mine. Costs about another 700$ because you have to mail the whole trans. The TKO 600 can handle 600 HP and tq. But it costs about 3000$ or more for everything needed to install because you would need the trans which is 2500$, bell housing for 550$, new clutch and flywheel about 600$ or more.
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Old 02-07-2014, 07:52 PM   #13
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Originally Posted by 89GTstanger View Post
I had a 351 in my 94 backed with a stock T-5. I drove the hell out of it for 3 years with no issues ever. I had the edlebrock performer intake, ported stock heads, F-303 can and all the bolt ons. Never had an issue with the trans.
That's good! Im not saying it was in your case, but there are some freaks from the factory out there. I've known guys that have run the piss outta their T5 and never had an issue. And I've heard the opposite. I'm just thinking of the torque rating on a stock one, and chances are his (and yours) exceed the factory threshold. Did you ever launch with slicks at all?

And to the OP, if you've got one lying around, I would go with that until it breaks or you find something better. Lol
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Old 02-07-2014, 08:03 PM   #14
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No, I'm not a big fan of drag racing. I was young when I had that car and played with it on the street pretty hard. The T-5 won my loyalty with that car. I also had a second 94 with a built 302 that had all the normal bolt ons, ported stock heads and GT40 upper and lower. Long tubes with h-pipe and 3:73 gears. Had the T-5 in it also and no issues with it either.
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Old 02-07-2014, 08:04 PM   #15
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That's good! Im not saying it was in your case, but there are some freaks from the factory out there. I've known guys that have run the piss outta their T5 and never had an issue. And I've heard the opposite. I'm just thinking of the torque rating on a stock one, and chances are his (and yours) exceed the factory threshold. Did you ever launch with slicks at all? And to the OP, if you've got one lying around, I would go with that until it breaks or you find something better. Lol
Alright I appreciate the input guys. I'm going to keep this thread going for future reference and if I have any more questions. Thanks again guys
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Old 02-07-2014, 08:10 PM   #16
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No, I'm not a big fan of drag racing. I was young when I had that car and played with it on the street pretty hard. The T-5 won my loyalty with that car. I also had a second 94 with a built 302 that had all the normal bolt ons, ported stock heads and GT40 upper and lower. Long tubes with h-pipe and 3:73 gears. Had the T-5 in it also and no issues with it either.
I've got a t5 in my 90' (I swapped it in after my AOD exploded), and a t45 in my 2000. I haven't had an issue with either yet, and I've got a Vortech on the 90' and I used to run a 150 shot (and a few 200 shots) on the 2000.

---------- Post added at 09:10 PM ---------- Previous post was at 09:10 PM ----------

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Alright I appreciate the input guys. I'm going to keep this thread going for future reference and if I have any more questions. Thanks again guys
No problem! Good luck with the build
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