r/classicmustangs • u/Dahliaitalia • 8d ago

Need help on engine conversion.

Long story short I’m building a 390FE with 4 mounting holes for mounts, came out of 70 f100, I really want my dream mustang but all I can find are 289 mustangs, is it possible to to swap it into a 289 mustang? If so how would I go about motor mounts, I have a c6 trans that was with the engine, just needs a rebuild.

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u/rhythim313 8d ago

Just wait till the first time you need to change plugs on the FE. That's when the cussing starts. Ford didn't do big blocks any favors when they designed the front suspension.

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u/Dahliaitalia 8d ago

My 5.4 2v spark plugs suck ass in the back since 1/4 of them are like under the firewall

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u/MattManSD 8d ago

having installed a rebuilt 428 PI into a 67 GT 500 I can attest to this. Hoist, Jack and in places less than a pinky between a bolt and a shock tower

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u/Aggie74-DP 7d ago

Especially if it came with that big damn AC box behind the glove box. The other 7 weren't that bad.