78 Bronco engine swap
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Joined: Nov 2000
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78 Bronco engine swap
we are working on a 78 bronco. it had a 351m with a automatic trans. (engine bad). we are buying a 78 with a 351c with a auto trans. will this engine and trans interchange? is this the same block? can i just change engine(our engine is already pulled).
Senior User
Joined: Jun 2000
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78 Bronco engine swap
You are buying a 78 what with a 351 C?
Ford NEVER put a C in any truck. The C ws not built after '74.
The C and M have different bell housing bolt patterns and different motor mounts.
I get some flak on this but if I was replacing a 351/400M I would use a 460. The 460 will bolt up to the M tranny and the motor mounts are the same.
Good luck.
Ford NEVER put a C in any truck. The C ws not built after '74.
The C and M have different bell housing bolt patterns and different motor mounts.
I get some flak on this but if I was replacing a 351/400M I would use a 460. The 460 will bolt up to the M tranny and the motor mounts are the same.
Good luck.
Elder User
Joined: Jun 1999
Posts: 861
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From: SE PA
78 Bronco engine swap
Measure across the top 2 bell bolts, if they measure out to 7 7/8" or so, then you have a 351M. This is also the size for 400's and big blocks. It is possible that the engine was swapped to a "C", or you might have a "W" in the 351 variety. Not sure on the measurement for these across the bell, but it will be smaller. I'd say see what you have bell wise and go from there. Hope this helps!
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steff
Clutch, Transmission, Differential, Axle & Transfer Case
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Jan 7, 2001 09:59 PM
