To complement the hydraulic-roller camshaft, the cylinder heads were assembled using No. 987-16 valvesprings, and locks and retainers supplied by Comp Cams. At an install height of 1.8 inches, these springs provide 125 pounds of seat pressure and about 325 pounds at maximum valve lift. The finished cylinder heads were installed using Fel-Pro No. 1016 head gaskets and the original fasteners, and were torqued to 100 ft-lb.