n/m just saw the other post.............mods can delete this
kdanner said:Many of those statements about the SBC are just not true. They don't all have the same size main journals, so you can't just use any crank in any block. Some are too large for some blocks, and others are smaller, needing bearing spacers. 302 and 327 both came with both size journals, so thay are not all the same as a 350. 2 different rod journal diameters. The 400 SBC is externally balanced so that crank needs a unique damper and flywheel. Vortec heads need different intakes. All heads need holes drilled in them to be used on a 400 block. Different valve covers with different bolt patterns needed depending on the year. Changes to the block/crank for a different rear main seal. You cannot use any old front accessory setup, some heads don't even have holes in the ends. Someone explain to me why these people take the crank from a 400 and stick it in a smaller bore block, the 383 makes no sense whatsoever, you want bore, not stroke.
Also, with some minimal work to a 400M crank, it can be used in a 351W block, so you do not have to have an aftermarket crank for a Ford either.
Just some lathe work. Cut down the counterweights some, reconfigure the snout so it matches a 351W.MadMikeyL said:PS. Enlighten me on the 400M crank in a 351W. What exactly needs to be done to make it work?