problem with screamin' eagle builds is that so few of them can be just bolted together and make good power...bear with me this may be a long post...
they all come with the wrong head gaskets
EXCEPTION: 103 stage 2...stock heads, 103 pistons and cylinders, 255 cams...works great assuming oil cooler and good tuning
htcc heads: require a lot of machining to set the quench, cnc ported have huge valves and ports that make for weak lowrange torque, expensive...non cnc ported are actually pretty good with a little cleanup and quench machining, but then again, why pay so much for heads and have to pay someone else to fix them?
103+ heads are similar to cvo 103 heads, outdated no-quench hemi, yet somehow we've seen a few good charts of these heads on 113 motors
mcr/performance heads are a fair value, have the good bathtub chambers but are as-cast, need cleanup, sometimes port-to-valve seat transition is ugly, ports need a little reshaping for optimal performance, again why buy and then pay again for cleanup?
acr, cvo110, 110+, mva are similar, modified bathtub, need more quench, ports and valves too big for good lowrange tq, some of these are very expensive, might work well on 117, 120, 124, 127, 131 but who wants to be the guinea pig?
verdict: choose a good head porter and have your stock heads rubbed
now for some pure bench racing: frankenstein build form s.e. catalog...113 bigger bore cylinders and flattop +.005 pistons(from h-q)...mcr heads (cleaned up)...se258 cams, se 58mm two-piece t/body...se injectors...d&d boarzilla exhaust, tuning device of your preference