X,B,or E303 camshaft?

[Capri306]

To heck with the alphabet cams IMHO. I've installed E cams in quite a few different configurations (okay, I helped install them in friends' cars several times, all with different combos), and all of them ran the same times or worse (MINE!) in the ¼-mile. If you want a lopey idle and terrible gas mileage, go with the E cam. I'll vouch for CompCams any day. They really seem to be on the right track. If the engine is more street-oriented and you need that fat torque curve, keep the lift high and the duration more conservative. This is why I'm a big advocate of using 1.7 rockers on the stock cam instead of just "jamming in a bigger cam and hoping it works." Forget bigger injectors until you have an engine that can support the airflow which necessitates them. Otherwise, it's more gas out the 'pipe. Try tweaking fuel pressure instead.

jim_howard_pdx: I didn't get the gains I expected with P heads, either. However, do you have any experience with AFR aluminum heads?