I have JBP alu 1.5 roller rockers on my street strip 455 w/ 96 heads for 5 years and have seen no sign of fatgue or stress. Pivots still roll free and smooth. I just have a hyd cam no roller or crazy spring pressures. Good luck.
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V.P. Pioneer Valley GTO Association www.pvgto.com
67 Lemans 455 best et. 12.023@ 111 mph LVD 9/2008
68 GTO H.O. in progress?
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