L78 Camshaft and springs

[Chevy454]

Spring technology, mainly material/manufatcturing has come a long, long way...any spring, even a stock replacemtn, made within the last decade should be ok...you're not gonna need crazy spring pressures with that cam...most folks just run the springs that come with the blueprint cam from GM/Crane.

[WILMASBOYL78]

Call Eric jackson..he hooked me up with a great package of valvetrain parts when I "freshened" my 70 L78 th400 car last year. The valve stuff in those old motors is like "an accident waiting to happen"...kept Chevy busy building CE blocks

wilma

[VintageMusclecar]

Thanks Tom.

The other big potential issue is those factory 2-piece valves...they've been known to pop their heads off with alarming regularity, and weak spring-induced valve float/bounce only exacerbates the problem. If the heads ever have to come off, replacing those valves even with an economy set of aftermarket 1-piece stainless steel valves is a HUGE insurance benefit.

Eric