I don't remember seeing any mention of making the passenger oil galley crossover larger in what I have read. Ya all might check into that!To a past post, Comp Cams roller cams typically have a faster ramp rate than most other cams. Thats why they tend to be noisier, especially with roller rockers, AND make more horsepower. My custom Buick roller cam had 14 different available lifts and ramp rates available for the same duration at .050! Choose your noise, valvetrain durability (street, drag, boat, etc.), and lift with relation to head flow and intended power. If you are not well enough informed to make a good catalogue or custom selection, the guys manning their Cam Help line will aid you.
Like "crate motors" in relation to custom builts, off the shelf cams are someone else's idea of what you need. Comp also sells other lifters than what is catalogued, they will help with that selection also.
Find someone with a cam analyzer and check a few different brands of "identical" cams, you will be amazed at the "area under the curve" differences.
Some smaller companies that still grind cams from old master lobe specimens that only have old, less aggressive patterns, spec their cams with less advertised durations and lift than they actually are, so they will make similar HP to modern cams.
Problems there include:
Less bottom end torque than you expect
Poorer idle quality
Slower spool up time
And often higher actual lift than advertised! That will bite YOU in the butt if your shop sets up your heads to what the cam card says! I was almost sued over that once! I had the customer cool off enough to bring in his cam to analyze first. His 276@.050 .738 lift cam actually speced as: 284@.050 and .780 lift (BBChevy race cam)
The cam companies defense, the owner said his catalogue stated: YOU MUST USE OUR COMPLETE CAM KIT WITH OUR CAMS!
The customer had me check his existing springs and set them up to the cam card specs. I don't do that any more! Bring me your cam and card!