If the car is being raced with closed exhaust, carefully consider how much overlap you really want.

Imo, a 260@.050 cam for an 8.5:1 360 will want a pretty loose 8” converter and enough gear to turn 6500+ thru the traps.

68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads