Re: Pure Stock Valve Spring rule
You guys might check with TRW. I know it was a long time ago, but when I had my '56 Chevy Jr Stocker we had to have stock valve spring, that had to check correctly. TRW had stock app springs that looked & checked exactly like the GM springs, but lasted longer. My General Kinetics "cheater" cam lobes looked like a roller profile, and was very hard on springs. It was a solid lifter engine that killed GM springs in three races or so. TRW spring would go four to five races.
Might be a viable source.
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Ed Wright 4156 SS/JA
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