Engine Build Ideas...PLEASE HELP.

Well cause were not dyno tuning it for one and I doubt their dyno is the same as every other and the cam you mentioned isn't that much bigger [Yea I know about the head flow of eq's] and if you would have said comp .525-.540 lift and 280*+ dur I wouldn't have commented.

BTW my fav was the mad scientist 340 [part2] I think?
I used that build as a base line back when it came out but didn't want that particular cam they were using [I used the .528 w/1.6=.533 after lash]
example 380hp rated magnum create really more like 400=292*roller
Even if there was a 10-15 cfm difference between heads the roller and it's profile would make up for that by holding the valve open further and holding it open longer where the heads flow the most.
But hey I'm just a human playing dynometer.lol
I usually shoot for solid for sure #'s that way I never sell something I can't produce, plus It's always much nicer for the customer to be pleasantly surprised they got more hp then they paid for [which is more then not with a mopar]