Re: moving the motor forward
When moving a small block from the original location in the rear position to the forward position, you need to either use the '67-'72 small block engine mount brackets, or the '73-'86 C20/30 or '87-'92 R2500/3500 frame brackets. The C20/30 frame brackets fit the earlier frames better than the brackets from a C10 of the same vintage.
Just be aware that many of the original '63-'66 components that have to do with the engine will no longer fit correctly.
The HEI will fit and work just fine in a small block mounted in the original (rear) location. Also there are no issues with a TH350, TH400 or TH700R4 fitting with the engine in the rear location when using the correct engine mounts and trans crossmember.
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