rebuilding a rebuilt slant

Yeah....a roller chain style cam timing set, that has billet steel sprockets, and you can alter your cam timing with.....see pic.

35 - 75 refers to the Inlet timing of the cam...opens 35* before TDC and closes 75* after BDC....meaning it has 290* duration at about 0.001" lobe lift, or close to it.....they were called a 3/4 ( Read :- three quarter ) Race cams.....full race cams were 40 - 80 and bigger.
A good set of headers helps heaps....as well as big valves and a port 'n' polish.

I am in the process of doing a 225 slant ( N/A ) for drag racing.....I will be using 3 x 45mm DHLA Delortos......makes it a 6 Pack of sorts.