The info from vendors over the net seems to be alot different and I need to know the max bore size of this block. Some say it's 4.090, some say 4.155. Some guys have said they could go 4.185 because its an advertising technique. Do you guys know anything? It says it has siamesed bores, and knowing what I do about aftermarket blocks, dont see why it wouldnt go 400 sized with meat to spare.

Trying to build a 'late model 434' small block.