i was just about to rebuild one of the 2 350 blocks i have then i thought why not go find a new/already rebuilt small block 400, i was wondering the problems i would have sticking a 400ci under my 350TPI setup, i know the block will bolt right in any suggestions would be apprieciated.
matt

 

Do a search but stuff like flywheel/flexplate, steam holes, and depending on the cam. Shouldn't be too extensive.