Differences in 400's
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Junior User
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From: in the double wide traile
Differences in 400's
Where all ford 400 V8's in cars and trucks the same throughout the years and were their differences.I don't mean the difference being hp and torque I mean is a 400 in a car the same as the one's in the trucks???
I know the 390 and 460's and cars and trucks were the same but I wasn't sure about the 400.
And if they are the same then aftermarket parts for the 351M/400 would work on a 400 out of a car correct???
Any help!
Thanks,
Dan
I know the 390 and 460's and cars and trucks were the same but I wasn't sure about the 400.
And if they are the same then aftermarket parts for the 351M/400 would work on a 400 out of a car correct???
Any help!
Thanks,
Dan
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From: in the double wide traile
Okay cool.The thing is I might be able to get a 71 400 out of a lincoln to go in my 78 F-150 but I wasn't sure if their was a difference in the two motors.
Thanks,
Dan
Thanks,
Dan
Hotshot
Joined: Dec 2003
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From: iowa
basically the dimensions of the blocks are the same with the only differences bieng in latter years they made some casting improvemnts, and there were a few with different bell housings but those are pretty rare, so for the questions of whether everything will bolt across yes it will.
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400's are not apples to apples ?
We see that the bell housings could be different. I am always asked what year I have by the machine shop, Why? I did hear that there are differences in the main bearing sizes , old to new ? So, can you put an old crank in a new bolck but use old type bearings or new. I also wonder on the deck height which I heard was different to. Anyway because the wreaking yards out my wat have alot of older 400's and I have a unmachined bronco block that I would like to build as a 400 from a 351m and can get the whole older engine to get the crank for just over a 100.00 plus tax. Help! Thanks
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From: PacNW
D7TE and D8xx blocks have the changes in the main webbing. They do take different main bearing sets from the pre 76 castings. Deck heights stayed the same throughout the production run. The early 400s cast with the Cleveland style bell housing bolt pattern were few and far between. Blocks cast in the Michigan Casting Center (MCC) prior to March of 77 are prone to cracking in the water jackets in the lifter valley. Cleveland Foundry (CF) and Dearborn (Detroit?) Iron Foundry (DIF) blocks didn't have the cracking problems.
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From: (near) Denver USA
The 351M and 400 use the same engine block, with exactly the same casting, machining, and dimensions.
The nominal deck height for all 351M and 400 blocks made from MY1971 through MY1982 is 10.297". The service spec for deck height on all 351M/400 blocks is +/- 0.005", so any 351M/400 block may have a stock deck height of 10.292-10.302".
When the 351M/400 engine block was revised for use in trucks starting in MY1977, the #3 main (thrust) bearing was changed from the original MY1971 design. So the thrust bearing needs to match the block.
All truck engines (casting D7TE) and late production '78-'79 car engines (casting D8AE) use the revised thrust bearing design. All other 351M/400s use the earlier thrust bearing design.
The 400 and 351M crankshaft designs never changed significantly, so you can use any 351M or 400 crankshaft, from any year, in any 351M/400 block.
The only 351M/400 blocks I've seen without the front dip stick hole were cast in 1980 or later, when the M-block was available only in trucks, and both 4x2 and 4x4 trucks used a rear-sump oil pan because of the '80-up front chassis design.
The nominal deck height for all 351M and 400 blocks made from MY1971 through MY1982 is 10.297". The service spec for deck height on all 351M/400 blocks is +/- 0.005", so any 351M/400 block may have a stock deck height of 10.292-10.302".
When the 351M/400 engine block was revised for use in trucks starting in MY1977, the #3 main (thrust) bearing was changed from the original MY1971 design. So the thrust bearing needs to match the block.
All truck engines (casting D7TE) and late production '78-'79 car engines (casting D8AE) use the revised thrust bearing design. All other 351M/400s use the earlier thrust bearing design.
The 400 and 351M crankshaft designs never changed significantly, so you can use any 351M or 400 crankshaft, from any year, in any 351M/400 block.
The only 351M/400 blocks I've seen without the front dip stick hole were cast in 1980 or later, when the M-block was available only in trucks, and both 4x2 and 4x4 trucks used a rear-sump oil pan because of the '80-up front chassis design.
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"Okay cool.The thing is I might be able to get a 71 400 out of a lincoln to go in my 78 F-150 but I wasn't sure if their was a difference in the two motors.:
WHOA!!! There was NEVER a 400 in any Lincoln.
The '71 Lincoln has a 460. where in the world did you get the idea it's a 400?
WHOA!!! There was NEVER a 400 in any Lincoln.
The '71 Lincoln has a 460. where in the world did you get the idea it's a 400?
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From: (near) Denver USA
There was NEVER a 400 in any Lincoln.
The 400 was available as the base engine starting in MY1977 in both the Lincoln Continental and Continental Mark V. The 460 was dropped as an option in the Continental and Mark V in MY1979. The 400 was the only engine available in those cars that year, and those Lincoln models were the only cars in which the 400 was available after MY1978.