There were only TWO 305 heads ever made, One was pre 86 one was 86+. Anyone that says otherwise has never seen a core book. The only different thing done was a few had slightly bigger valves but negligible. Robert Adams On Fri, Nov 12, 2010 at 7:16 PM, John Christensen <johncgg@xxxxxxxxx> wrote: > Just found these for the monte. The heads that are on there are shot and I > have coolant and oil leaks. It takes a couple minutes every start to let the > oil burn off and the smoke ti clear because if the bad valve guides. Should > work fine for less than a valve job on mine. > J C > > Sent from my iPhone > > Begin forwarded message: > > CST > *To:* John Christensen <johncgg@xxxxxxxxx> > *Subject:* *Re: Chevy heads 305 HO fresh 416 - $50 (McHenry)* > > Hey there, > > These heads are pre-vortech so the do not have angled bolts. They have > perimeter valve cover bolts. They are fresh and ready to run other than > needing a quick surfacing. all components are new. If you have flat top > pistons in your motor now, your compression is going to be really high > though. You say its older. if its mid 70's to early 80's you may have > slightly dished pistons which will give you about 10:1 compression. I also > have an intake if youre interested. > > On Fri, Nov 12, 2010 at 7:12 AM, John Christensen <johncgg@xxxxxxxxx>wrote: > >> >> I have an older style 4 bolt 350 block (1 piece rear main seal, perimeter >> valve cover bolts) in my 1987 Monte SS. Someone before me swapped this older >> engine in, but the heads are tired and smoking on start up. If these heads >> will fit, I would like them. >> >> Are the middle intake bolt holes the same angle as the outside ones on >> these heads? or are they the 110* angle bolts? Center bolt valve covers? >> >> I am off on Saturday and I come and get them. I live in Saint Charles. >> What is your address? >> >> ------------------------------ >> > >