I mentioned the Hughes because they have the lowered oil band. COMP Cams might have that also, just verify. Again all of this depends on your lifter bores...if they are chamfered and you don't have the correct lifters, you will have oil pressure issues. The Hughes link that I posted earlier discuss this problem in more detail.
IIRC, some folks have had issues with the oil bands on some blocks regardless of lifter type, if that particular block's chamfers are deep. And it also depends on the base circle diamter of the particular cam.
The chamfers are quite variable in how deep they go. Some blocks chamfers are shallow and so have fewer/no issues. I have never read an explanation of why the chamfer depths were so varied, or exactly what purpose they served in the first place.
