Reply to "351C heads"

the XE274H is a flat tappet hydraulic cam with the agressive ramps of the Comp Cams Xtreme Energy (XE) line of camshafts. It has a rated power band of 2000 to 6000 rpm. I have that one memorized (sometimes) because of the power band. The XE cams feature higher lift than Comp Cam's other lines of flat tappet hydraulic cams, the Cleveland responds very well to higher lifts, it gets the velocity up in the big ports of the Cleveland cylinder heads. In Comp Cams notes on that camshaft they make special mention that this cam has excellent throttle response, a comment they fail to make regarding any other Cleveland camshaft.

Drawbacks? Those aggressive cam lobe ramps make more tappet noise than other, less aggressive camshafts.

I am not familiar with the cam you mentioned, apparently you got the number from somebody else, but you fail to mention who. I do not like being put into a position where my advice is being pitted against the advice of somebody else, especialy when I am not informed whos advice I am "competing" with. I am always willing to step aside for someone of greater authority.

George