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Very suprised...

1K views 4 replies 4 participants last post by  jimfulco 
#1 ·
327 w/ stock vortec heads and springs... runs to 6,000 with no valve float (L79 cam). Just had to comment for no reason I guess.
 
#5 ·
All those old production SBC high-performance cams, hydraulic or solid, since ~1968 were used with the same valve springs that came with Grampa's 2-bbl 307 econo-motor. The stock Vortec springs have very similar specs.

That's not to say a spring upgrade's a bad idea, but sometimes factory parts work together better than one might imagine.
 
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