Originally Posted by Elevinpointsixtoone
...L-98 GM Aluminum vett heads 1.94/1.50, 163 CC intakes that flow around 196 CFM at .500 lift..and those wonderful 58 cc chambers that give me that CR with flatops.... Thanks!
These heads are OK, the down side is the poor short turn. A good port job will wake it up. Personally I'd stick with the stock valves. Open up the pinch point at the pushrod, smooth out the short turn removing as little material as possible. Concentrate most of the porting in the area 1" before and after the valve. Shoot for 235 SCFM on the intake side.
Camshaft selection will be critical.