Wasn't the 1970 LS6 rated at 460hp in the corvette? I think GM had some rule that no car could have more hp than the corvette
BOTH the LS6 and LS7 were ORIGINALLY scheduled for 1970 Corvette production-------------NEITHER WERE EVER INSTALLED IN A PRODUCTION 1970 CORVETTE!
PRODUCTION, repeat, PRODUCTION 454 installed in the 1970 Corvette was the LS5/390hp version (same as the 70 Chevelle LS5). Then, in 1971, the Corvette did get an LS6, but it was ONLY 425hp because of lowered compression.
The LS7 would have sorta, kinda have been a larger version of the 427 L88, with alum heads. Didn't happen. Yes a tiny quantity of LS7 engines with alum heads did get built and 1 or 2 got installed in 70 Vettes, and were driven by some members of the press ---------------------BUT THESE WERE NEVER AVAILABLE TO THE PUBLIC!!!!!!
Also, LS7 engines were built and sold OVER THE PARTS COUNTER-------------but with IRON
heads. A dear friend of mine bought 4 of them from a Tulsa Chevy parts depts and he still has 2---------in the crate.
To me, the ultimate would have been an all aluminum 454 (ie the 69 ZL1). At one time, Chevrolet did sell bare alum blocks for those who wanted to build their own killer alum 454. Somewhere around 2003-04-05, someone had a 70 SS at Chevellabration with a "built" all alum 454 (anyone remember that car?). Pretty awesome I thought!