Ya it seems to be two camps on the spring pressures
with solids on HR cams. I have been running the 99893 springs at 160/400 for years and no issues. What I find
Weird about the weight thing is the solids are lighter lifters
I realize it’s about lash and cam profile though. And yes recommend by builder.
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68 Firebird. IA2 block, 505 cu in, E-head, Solid roller 3650 weight. Reid TH400 4:11 gear. 29" slick.
Best so far 10.12@133 mph. 1.43 60 ft.
76 Trans am, TKX .81 o/d, 3.73 Moser rearend,
468 with KRE D-ports, Doug headers, 3" Exh.
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