Saw an ad for a vehicle that indicated the F250 had a Ford 406 cu in engine, he says it's a 428 block with a 390 crank. I never heard of this combo, it seems like a de-stroked 428. Is this a possible combo, or is this guy blowing smoke.

The F250 is a '74, so it could have had a 390...

Thanks for any help.

Yes, it is a possible combo.

428 Bore of 4.13
390 stroke of 3.78

Yes, it is a possible combo.

428 Bore of 4.13
390 stroke of 3.78
But why would you????? :confused:

If memory serves me right Ford used a 406 in the early 60s, it was a hi-perf. engine but I don't think it got into the trucks so it may have been transplanted.

John

If memory serves me right Ford used a 406 in the early 60s, it was a hi-perf. engine but I don't think it got into the trucks so it may have been transplanted.

John

Yes you are right, it was never a truck motor. Ford built a 406 tri-power that was ballsy as all hell. It was a high performance option for the Galaxies and possibly some other big body cars.

The 406 is the early version of the 427 it wasonly made in 62 and 63 and has a 390 stroke 3.784, and a 428 bore 4.13 basically it's a 390 bored .080 over with factory hipo heads if many people try to pass regular 360's or 390's as hipo engines and you really can't tell until you tear it apart possibly it has numbers on the pass. side front of block just under the head first two letters should be c2 or c3 for 62 or 63 same with heads between 2 and 3 spark plug hole first 2 letters should be c2 or c3

Cool thanks for the replies. Good info.

a nugget of worthless tech dribble. on the drivers side front of the block, there will be a number written backwards, either 352, or 108, Supposedly, the 108 blocks have thicker cylinder walls and will accept an .080 over bore, whereas the one with the 352 casting might have issues.

it is a regular 352 on most FE blocks or mirror image 105 not 108 most of the 105 blocks were FT heavy duty blocks they have additional main-bearing support and thicker main bearing webs sorry for even more meaningless info

it is a regular 352 on most FE blocks or mirror image 105 not 108 most of the 105 blocks were FT heavy duty blocks they have additional main-bearing support and thicker main bearing webs sorry for even more meaningless info
hey, I was close enough :-D Weren't the FT blocks kinda different although they used alot of the same parts? My FE/FT tech is a bit rusty....

the heads have a different place for the exhaust cross over so you can't put a fe intake manifold on ft heads or vice versa and the crank snout is bigger on an ft 1.76 where a fe is 1.38, also ft's are externaly balanced, execpt for the 428 and 410 fe cranks are internally balanced.

Here is a great spec sheet on FE engines: http://www.woodyg.com/fairlane/finfo/fespechart2.html