Thanks Paul.

I finally scraped the rust off in enough places and found the weight markings on the springs.

375 front (hyperco) 300 rear (carrera).

I was thinking of testing with 350f/275r and 375f/275r and then 375f/300r like it is now. Keith ran 400/350 at one point but that was with RR shocks. He won the ARRC with Bilstein's and 350/285. I dunno who makes 285 lb springs, maybe Carrera did at one point.

Thanks again to all who posted.

Tom