Hey Big Dave, Bill, and John,
I'm NOT trying to be argumentive here, just going to try to relay some previous experiences in regards to statements made here. Every Big Block Racer(S/S-Pro Stock-Funny car) that I knew "Back in the day", WOULD have NEVER used anything other than solid lifters, and the heads of choice were Rectangular/ Square port,Open chambered. Although, A LOT less compression with nitro. As for the existence of a complete LS-7 motor from Chevrolet....Yes, THEY did come from over the parts counter in a crate. All one needed to do was mount a carb and drop in a distributor. Now if my memory serves me correctly (I can't find my receipts,that far back and several moves,one involving a tornado) the price was $1,395. plus tax. Also available were Open Chambered Aluminum heads bare or complete.In 1973,I had 5, LS-7's come through the shop and 10 boxes with AL.OC heads. As everyone knows, IF we had the technology then as we do now,oval port heads would not of been used as boat anchors. Today,we get so much more out of them with less compression,better rotating assemblies, and add EFI...."The possiblities are endless"!!!!! As for your last statement Big Dave, I saw one ZL-1 in Illinois in a Camaro and it too had Rec/square port heads. I know anything could of been put together.... I'm just stating the things I have seen/been part of over the years. I hope this has not "Muddy the Waters"