【How-to】What compression should a 305 have

The L82 featured many different components than the L48. The L82 had larger heads and valves, four-bolt mains, forged steel crank, different pistons and aluminum intake. Although the cam is stronger in the L82, it’s physically identical to the L48. The L82 had 2.02-inch valves and the L48 measures 1.94 inches.