A buddy and I were talking about 351/302 block ideas to fit into our budget. He's working on a 393 non-daily while I'm kicking around 347 stroker daily. So regarding the 351 block and sourcing the parts to do the actual swap until better heads can be obtained, "Will the gt40p heads fit without drilling out the head bolt holes or will they need to be drilled??" I already understand about the dizzy, lower intake being wider and possible vert mounts to help lower the actual engine because of hood clearance and the addition possible new headers, WHO knows this????