OK some of you know I recently fired up my engine and broke in a new cam. Engine sounds great in the garage under no load but when driving it I'm getting some noise from the valvetrain (I think) when accelerating. Here is what I did to the engine: 1978 302 shortblock with 41K miles Edelbrock Performer Plus Cam Duration at 0.050" Intake: 204° Exhaust: 214° Lift at Valve: Intake: 0.476" Exhaust: 0.502" 1990 E7TE heads (rebuilt) with stock valves and springs Crane 1.7 ratio pedestal mount roller rockers Cloyes double roller timing chain Edelbrock 302 Performer intake Holley 600cfm Vac Sec carb Factory Duraspark distributor MSD 6A with MSD coil Professional Products 28 oz Damper Hooker super comp headers with 2.25 " pipes C4 with shift kit and stock convertor 8" rear with factory 3.00 gears My stock compression was 8.4 with 69cc heads so with the swap to the 64cc E7s my CR is around 9.0 so 87 octane should be OK right? My initial timing is set at 12 degrees with vacuum advance disconnected and plugged. I put a vacuum gauge on it and I'm pulling about 19" of vacuum at idle with little needle fluctuation. And when revved the needle moves steady not jerky (see attached video). Total timing seems to peak at 29 degrees at 3K rpm. I just went through and checked/adjusted the lifter preload. Some of them did need to be shimmed and I have them all torqueing at about 1/2 turn past zero lash. It does rattle less today than it did before, I found 2 of the rocker saddles were cracked. Can anyone point me in a direction? I'm still running the stock springs but since I'm not really pushing it I would think they should be OK for know.