Cam Choice

The older wide lash cams did beat things up more and require more maint. but the new tight lash cams are very low maint. Most people I have talked to say they only adjust them once a year and even then they might only be .001-.002" off. Different types of rocker arm setups make a diff. too. Chevies ball and stud rocker wears more because most of the hammering from lash occurs at the fulcrom and unless you change the factory adjusting screw to positive locks you have to adjust them more often because the factory adjuster nut even though self locking wasn't tight enough to keep vibrations from causing them to back off. Same goes for the original 273 rocker adjuster screw that's why changing them to a screw with a locknut design helps them hold the lash adjustment longer.

What Moper said about trusting dyno programs is true to a point. They can give you a good idea of what your engine can produce but there's still allot left on the table that can affect things even if you know your flow numbers and put them in and it's a program that considers rod ratio. For instance I have the newest version of Desktop Dyno and have mocked up my 408 I'm building but it has nowhere to input piston and rod weight. I have assembled an extremely lightweight but strong rotation assy. The pistons are Wiseco forged that weight 452 grams each. The pins weigh a few grams less than stock. Same for the rods. Their SCAT rods and I don't remember the exact weight but I know their quite a bit lighter than stock. I figured up the weights and my complete rotating assy. weight within a few grams of what a Magnum V6 rotating assy. weighs. In other words it's 2 whole piston/rod assy's lighter than a stock 360 magnum assy. That has to have quite a bearing on power production. None of the programs take tht into consideration. Also the intakes you get to choose from are kinda generic. For instance do you consider the very popular Edel Air-Gap a High flow or a Max flow intake? Model both on the dyno program and you'll see a huge difference.

What Moper said about the agressiveness of the solid is true and helps power output. I see the Comp solid is also a higher lift and split duration/lift cam which may be a better match to your heads also contributing to the higher power output.