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Old 06-01-2013, 02:07 PM   #1
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big block swap

Can I fit a 390 in a sn body??
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Old 06-01-2013, 05:17 PM   #2
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Ive seen it done on youtube. It takes up every bit of space in the engine bay
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Old 06-01-2013, 05:35 PM   #3
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Ha I've seen a mustang cummins. ANYTHING can be done.
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Old 06-01-2013, 05:40 PM   #4
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Ok I still want it to be drivable
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Old 06-01-2013, 10:05 PM   #5
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You can shoehorn a 460 into a SN95 if you want... It would be really cool but for the money completely not worth it and you'll have a ridiculously RIDICULOUSLY nose heavy car. When a 408 stroker can hit 500+whp on pump gas and be perfectly streetable daily driveable I'm not sure why you'd do anything different for a bigger cube motor.
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Old 06-02-2013, 07:52 PM   #6
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Yes the 390 will fit. The 390FE engine installation is the same a 460FE engine installation. This could end up being a cool swap to do as the 390 can be had cheaper than the 460 and uses the same swap parts as the 460 which means you wont have to custom fabricate any parts for the swap.
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Old 06-16-2013, 08:00 AM   #7
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390 and 460 are 2 totally different engine families!!
nothing is interchangable
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Old 06-17-2013, 09:28 AM   #8
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Your right I had a brain fart. They are not the same engine family.

Reguardless the 390 does fit in a sn body. You will need a few things and will most likely run into a snag ot two with such a swap but we are here if you have any problems. Since you have a SN your stock brake booster shouldnt be in the way for the driver side valve cover which is a plus. That said, you should only need basic swap equipment to make the swap work. The engine, K member, custom oil pan, swap headers and remaining exhuast, steering rack, engine mounts, trans conversion plate adapter, thin profile radiator and electric fan setup. You may strugle with getting guages to work but we can help you with that when you get that far. I dont know the exact engine height for the 390 but if its close to the 460's 32 in engine height you will need to find a way to make room. There are a few ways to make room, the engine can be lowered in the craddle by way of using engine lowering engine mounts or K member spacers and a low rise intake manifold will help. A few guys have swaped 460 and been able to fit everything under the stock hood with the right parts but you should plan on having to buy a different hood, cowl or otherwize, after you swap incase the stock hood wont work for you. It is also important to see if the swap is leagle for street use in your state before you go through with it.

I would adivse against a swap like this, theres not much performance benifit to be had for the money spent unless you just have to have that "BB" rumble sound.
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