Re: FH Valve Springs
The bronze guides are almost a mandatory item with us on all our FH builds, but we've never needed any 1-pc all bronze guides, we simply line the originals and machine them (intakes only) for some Viton stem seals. Not needed on the exhausts.
Here's another situation where the much longer Chevy valves create installed spring hgt issues. Been down this road more than 45 years now and have never used the longer valves. Really unnecessary?
With respect to the valve springs, the OEM pieces we supply to most customers yield 70# @ 2.060" with 130# at .375" lifts.
For some slightly higher performance builds we use the 185G's, these yield 85# @ 2.060" with 180# @ .375" lifts.
Most "streeter's" are fine with the lighter springs, they will take you to the 5000 RPM area easily.
Thanks, Gary in N.Y.
P.S. Here's a couple shots (again) of the bronze-lined guides, S/S valves, and seals. Also a shot of our very own design "adjustable" spring-seat hgt locators, allows the the use of up to (5) .060" shims plus the locator thickness (.060") and is still able to locate the springs!
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