165HP I6 VS 130HP I4

[spareparts]

i think factory is 4200 to 4600, the stock valve train doesn't like more than that. We were turning that 165 4800-5000 in that Stingray, every once in a while we stuck a pushrod thru the rocker. Years ago there was a guy around Atlanta that was running a 3.7 in a drag car( econo modified dragster), he was runnig an aluminum aftermarket head, came up with his own cam drive( went to gear drive from chain) and ground his own cams, heard he was turning it 9000 rpm!