[JRSully]

Taz, I believe I used a very close to stock, dual valve spring. Consulted with Crane (roller rockers) and my engine builder, but I know they are very close to stock. All the hp is in by 6000-6500 on a stock L78 anyway, no need to rev it any higher than that, just asking for trouble. Roller rockers are the ticket on these engines (unless you need to have stock valve covers, but you can use a camouflage spacer)they really let the engine rev and are very durable. Valve train is the weak link on these engines. But mine (with this set up) has been bulletproof and I have adjusted the cam only twice in 6 or so years