Inliners International Forums General Discussion Hi Performance GMC Camshaft Advice

The E2 Isky grind is 264 duration with .448 lift, 23-61=61-23
The E3 Isky grind is 286 duration with .448 lift. 34-72=72-34

I don't know the stock spec, but TRW list a stock replacement cam for the 302 with 252 intake duration, and 276 exhaust duration, with .279 lobe lift. Others might have the stock specs. Hope this helps.