1967 - 1972 F-100 & Larger F-Series Trucks Discuss the Bumpsides Ford Truck

302 4-spd to 390 C6 engine swap

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Old 02-21-2004, 02:22 PM
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I sure its been asked before but.....

I tryed to do a search but no luck. I have a friend that has 390 and c6 tranny that he wants to drop into a 72 f-100. What all will he need to do this convertion??
 
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Old 02-21-2004, 04:02 PM
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it all depends on what was in the truck before.
 
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Old 02-21-2004, 04:04 PM
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Depends on what engine/tranny were in the truck before....if the same type then the mounts, driveshaft,etc are fine...if not you will need engine mounts, towers, may be able to use the old trans crossmember, driveshaft may have to be adjusted for length, rad,exhuast manifolds..........there must be more.
Alot easier if the truck formerly had an FE/C6 combo. May even have to get new front springs depending on how much the front drops.....FE's are quite heavy
 
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Old 02-21-2004, 04:07 PM
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You never mentioned what engine & Trans is in the truck now

In searching, did you uses the words > Engine Swap ?
 
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Old 02-21-2004, 05:19 PM
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its has a 302 and a 4sp standard tranny.
 
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Old 02-22-2004, 10:24 AM
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you'll have to get the motor mounts from a 360 or a 390, not sure about the crossmemeber. i think it would be the same.
 
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Old 03-12-2004, 01:14 PM
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the cross member has to be moved forward or backward depending on the length of the x mission and engine. I put a c- behind my 351c and had to move it back 1/2 inch, but was no problem because the holes were already there.

Steve
 
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