Dead 400?
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New User
Joined: Mar 2006
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Dead 400?
I need some help, I just bought a 79 Bronco with a bad 400 I'm having trouble finding a replacement so any help would be appreciated.
How far can a 400 block be overbored?
What other motors can be bolted in its place?
Will the intake, distributor, exhaust fit any other motor?
How far can a 400 block be overbored?
What other motors can be bolted in its place?
Will the intake, distributor, exhaust fit any other motor?
Senior User
Joined: Apr 2004
Posts: 297
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From: Spokane, WA
429/460 have the same bell housing. They do not however just "bolt in" . Issues must be resolved with A/c comressor mount, exhaust manifold clearance, alternator clearance, motor mounts....these issues are on the full size trucks. There may be more or less with the Bronco but I am sure it could be done.
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New User
Joined: Mar 2006
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Above info is helpfull, I have all sorts of hipo stuff for the 400 but I don't know if it will fit a 429/460 ie. intake, headers, dizzy.
What other cars/ trucks came with 400m or 351m?
I guess I could resleeve the one bad cylinder but I'm kind of strapped for time.
What other cars/ trucks came with 400m or 351m?
I guess I could resleeve the one bad cylinder but I'm kind of strapped for time.
Senior User
Joined: Dec 2005
Posts: 229
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From: Fargo, ND
53fatfndr is right, only the distributors are the same. the intakes and headers, etc are different. You can get a motor mount kit from the bronco graveyard to swap in a 429/460 and they do take the same bellhousing. Although you should be able to find a 400 in the junkyard in one of the 70's boat cars or if you're looking for a long block, I know that Gopher and Jasper both do remans. I have a Gopher reman in my truck and it has held up great.
