I have an Eagle 347 stroker kit with JE pistons and rings,Clevete 77 bearings.It is a low compression kit for Turbo/Supercharged Applications. $1100 shipped
Without knowing anything about the kit at all, I can tell you with absolute certainty that the block would definitely need to be clearanced. The longer 3.4" stroke would smack the rods into the bottoms of the cylinders.