[Rich Biebel]

I used a GK 308 cam in 1980 in my 350/255 Camaro. I am guessing at the lift and the 434 usually would mean that was the lobe lift. Multiply your rocker ratio times that 434 number and subtract the lash. 308 is the advertised duration and @ .050 I'd have to guess was around 280. My GK was a real parts breaker.....it came thru T/K's and Ralph Truppi and was tested and ran real fast in some other cars. Not mine though! I broke rocker arms,valve springs and stopped using that GK cam because of the breakage. Mine was a regrind so maybe that is why it broke a lot of parts. Too much flex and the rockers and springs were not good enough...... A Cam Dynamics 316-321 worked much better for me......