May 11, 2021 · The XAA suffix 454 LS6 crate engines had 10.2:1 compression, I believe they had a .340 tall or -30 cc dome. My 1970 SS454 LS6 SuperCar certified stock appearing …

Dec 8, 2006 · An LS6 on F70 X 14 tires would helpless, with slicks probably well into the 12s. We had our COPO Chevelle about a month before putting bigger tires on it. Made lots of smoke …

Dec 5, 2005 · In 1971 the LS6 was factory installed in the Corvette ONLY and was equiped with alum. heads. These heads were open chamber and Chevy didn't make a piston change, so …

May 3, 2007 · My Chevy Power / GM Performance manuals all list the LS6 cam (#3904362) as 307I/298E at lash point, 275/271 at .010 tappet lift, and 242/242 at .050. John Save Share

Dec 22, 2013 · "The term LS-6 is one of the more "bastardized" logos in Chevy folklore. Just what is a "LS-6." A LS6 is: a 512 4 bolt block, Steel tuftrided cross drilled fordged steel crank, …

Mar 19, 2025 · Selling your 1970 Chevelle SS 454 LS6—a Cranberry Red, black-striped survivor with 29,348 miles, loaded with ZQ9, G80, GW8 4.10:1 axle, ZL2 Cowl Induction, U14 gauges, …

Jun 7, 2005 · They have 11 to 1 CR, forged pistons and big strong 7/16" bolt rod forged rotating assembly, big valve rect port heads, and a hy-po for the time solid lifter cam whereas the …

Apr 12, 2005 · "The LS6 heads that came in the LS6 Chevelles were CLOSED CHAMBERED no ifs, ands, or buts about it".....Actually they were "semi opened" or "semi closed " if you …

Nov 27, 1998 · The heads say HI PERF and the Numbers as follows 3994026 and yes they are open chamber and rectangular port cast iron and yes they made an LS6 in 1971 for an extra …

Oct 10, 2010 · 188 Corvettes where built in 1971 with the LS6 motor. No LS6 option for Chevelles after 1970 They had open chamber aluminum heads and a .095 tall domed piston. The crate …