Re: Flat Tappet Setup
I think you are fine. Just keep an eye it when you change the oil for excessive wear and keep an eye on the valve adjustment.
The ramps on GM style cams are not that aggressive and should be OK. Problems tend to arise more with wilder cams and higher spring pressures.
The 840 heads are good for high RPM runs, but oval ports will beat them on the lower RPM range.
It was interesting you mentioned the 512 block. I am sure you know the 3963512 blocks were not COPO only blocks. They were used for the entire Chevrolet line from full size (Impalas/Caprice to Chevelles, Camaros and Corvettes) in 1969 for the 427 and 1970 for the 454. Is your car a COPO?
68 Camaro SS 396 - 468 BBC now, M21, 12 bolt 3.73 coded housing but w/ 3.31 gears.
Looking for 68 Camaro with body number NOR 181016
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