engine swap
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New User
Joined: May 2008
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From: Colstrip Montana
engine swap
I have a 78 ford bronco with a 400 and a c6 transmition and just bought a 460 that i want to put in it, so i have a question will the 460 bolt up to the c6 that is already in my bronco. also is there anything else i need to know about swaping a small block to a big block
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New User
Joined: May 2008
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From: Colstrip Montana
it was originaly a 351 but 351 and 400 have same block and it is now a 400 but the 400 is still considered to be a small block
Lead Driver
Joined: Sep 2002
Posts: 9,182
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From: Gateway to the West
The 351M is a smaller bore (than the 400) big block and the 351W is a smallblock with taller combustion chambers if am am recalling correctly. Two completely different engines.
Aciancio has it right though, a big block is a big block and the 460 swap shouldn't present a problem.
Aciancio has it right though, a big block is a big block and the 460 swap shouldn't present a problem.
Post Fiend
Joined: Mar 2002
Posts: 19,402
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From: Bonita Springs FL
Big block/small block is a GM term anyway, so I'm not sure what you guys are talking about. 
I call a 460 a big block anyway, but I don't get hung up on whether a 400 is a big block or not. It does share the same bellhousing pattern as a 460.
I call a 460 a big block anyway, but I don't get hung up on whether a 400 is a big block or not. It does share the same bellhousing pattern as a 460.
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Lead Driver
Joined: Oct 2004
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From: Central Oregon
My 80 Bronco had the 351m and now has a 460. Trans/torque converter bolted right up. The 460 was a car engine and the exhaust manafolds from the car were used, so the frame on one side was notched for the manifold.
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Fleet Mechanic
Joined: Mar 2005
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From: St Louis
Thought that 289, 302, 351 (C, M, and W), and 400 all shared the same 4.00 inch bore and cylinder spacing. Though there are exceptions in block, heads, stroke, etc. being completely different.
Posting Guru
Joined: Oct 2005
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From: Longwood, Fl
Big small block or Small big block?
This comes up every once in a while. No use arguing over it, it dosnt change
From the 221 to the 400, all have the same bore spacing 4.380". Deck heights range from 8.2 to 10.297", all changed to accomodate more stroke which = cubic inches. The Ford SVO catalogs list them as "small blocks". Ford only made 1 400 engine, no need for a special character to designate it. The 351's needed something to distinguish. W,C,M.
I have decided that I dont care what they are called-----, No matter what you think or argue, someone will disagree----.
I hope this goes on for a while-----I have just put on some popcorn
From the 221 to the 400, all have the same bore spacing 4.380". Deck heights range from 8.2 to 10.297", all changed to accomodate more stroke which = cubic inches. The Ford SVO catalogs list them as "small blocks". Ford only made 1 400 engine, no need for a special character to designate it. The 351's needed something to distinguish. W,C,M.
I have decided that I dont care what they are called-----
, No matter what you think or argue, someone will disagree----. I hope this goes on for a while-----I have just put on some popcorn
