Is there any difference in 5.0 engine bocks? - Mustang Evolution

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Old 12-28-2013, 06:51 AM   #1
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Is there any difference in 5.0 engine bocks?

Today is 1/2 price day at the boneyard & I can buy a complete motor for $130.
I recently picked up GT40 3-Bar Heads & Intake & I'm planning to use a E303 Cam. I'm in the process of Cleaning up & rebuilding the heads now & I'd like to just go buy another motor to build so I can keep driving my car til the motors done. I'm not sure if the are any differences in a 94 Mustang GT 5.0 Block & say an 80's 5.0 Block or the 5.0 Block from a 98 Explorer. I keep seeing an ad on craigs list for a Chrome Timing Cover that reads "87-93 Block Plate Required" so it's got me wondering if there's differences in Blocks. Also wondering if the motor mounts will be the same. I sure don't want to waste all day pulling an engine I can't use or the $$$ either. What kind of stuff should I look for when deciding on which engine to buy? Obviously, I'll be looking for a low mileage, preferrably wrecked in the rear vehicle to pull it from...but what should I look for on the engine itself ?
Sure will appreciate any info I get on this. THX !!!
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Old 12-29-2013, 06:02 PM   #2
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85-93 came with forged internals, that's about all I know on the 302 motors. Looking forward to learning something new!
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Old 12-29-2013, 06:12 PM   #3
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Is there any difference in 5.0 engine bocks?

^^ this is not fully correct, I'm pretty sure it was 85 to 92 and it was just forged pistons. Not fully forged internals....
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Old 12-29-2013, 06:18 PM   #4
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And to the original question, what kind of build will you being doing to this motor from the junk yard? Will you be just using the block and getting new heads, cam, etc...?
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Old 12-29-2013, 06:25 PM   #5
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And as you know there is flat top pistons till 85 or 86?? Correct me if I'm wrong
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Old 12-29-2013, 11:13 PM   #6
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86 also has flat tops, and yes you are correct that it was forged pistons.
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Old 12-30-2013, 07:04 AM   #7
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Quote:
Originally Posted by Adogg View Post
^^ this is not fully correct, I'm pretty sure it was 85 to 92 and it was just forged pistons. Not fully forged internals....
Ye they switched to hypereutectic pistons half way throw 92
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Old 01-03-2014, 08:55 AM   #8
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Get a 85-up block just to be safe. Internals on the 85-92.5 are all the same with the exception that the 86 had flat tops. Halfway through 92 they did go to hyper pistons but it really doesn't matter as long as your tune is a good one. Plenty of 93-95 cars and cars with explorer bottom ends on boost/spray with no issues.

However what exactly are your plans? I would be MUCH more interested (if I were you) about getting a 94-up 351 block out of a pickup or Econoline van if you are planning on doing any sort of forged internals or a serious pushrod buildup. A 351 stroker is better in every possible way, does not cost hardly anything more and its not just better by a little bit, its like having the choice of sleeping with Brooke Shields in the 80s or Brooke Shields now.
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