i'll be picking up my low deck dodge 241/270 short block next Friday(thanks Jack). it's got me on the look out for hemi heads. then I got to thinking. I already have the firedome in my 46, what I need is a poly. everybody is taking off their poly heads to turn their mills into hemis. poly heads should be laying all over the place. so what parts do I need? all I have is a rotating short block. poly pistons will have different valve reliefs. are the intakes the same? I hope the intakes are the same. are all poly heads the same? is there a better choice? let's share the knowledge.