Thanks for the replies, I am trying to figure out a good starting point for my clutch and this will help.
I am starting with a orange and white spring with 51.5 poo weights. This has a standard salsbury secondary with the stock black spring, I did file the first 1/3rd of the helix. I am guessing the weight is going to be heavy for the hp but I will give it a try.
I have a ways to go before snow flies but the first oval race is in january and I am getting ready to go finally.
1974 El Tigre 400 - New Vintage Racer
1993 Mach 1 583 bored .060, sc10 II skid.
1978 and 76 Jag 3000 FA - both sold 1980 Jag 340fc electric start (parts sled) $50.00