Shaggy
6
This just a quick top of my head reply
1991 Zr1 32 valve corvette.
http://www.mathewscollection.com/corvette/Corvette_91_ZR1.htm
4 valves are common in domestics for better then 10 years
oh look the quad 4 olds was 4 valve in 1987 .
wow. again the 1996 cobra was 32 valve