I talked to the engine builder today. He did not have the cam card, because he said he gave to owner. He did say it was 260-280ish duration with the 660/640 lift. Said it was an Erson billet cam with the Morel lifters. and matching Erson springs. Said it a solid set-up that would live on the street with proper maintenance. Said it was actually built to drive on street, with in reason.
There is a world of difference between a cam with 260 to 270 degrees at .050 compared to a cam with 280 to 285 at .050
I ran a Comp Cams custom grind solid roller that had "BB Chevy" lobes on it that was 260 @.050 on the intake lobes with .420 lobe lift and it had a different lobe on the exhaust that was 266 @ .050 with .409 lobe lift ground on a 108 LSA in my old pump gas 400 block 511 C.I. stroker motor. I ended up doing a bunch of parts changing on that motor but I kept the same cam with different lifters and rocker arms, it was really raspy sounding at idle and up to around 2000 RPM in gear
That rascal was a lot of fun, it pulled really hard from idle to 7800 RPM
