engine combos for a compressor.

[hartsel]

im running the n42 combo right now. its what came with my car. in the near future i want to install one of those dandy eaton m90 superchargers into the passenger side of my engine bay. but thats not why im starting this thread. i want to know if the n42 head and block would be the best choice to start building on for some added boost. id love to get a f54 p90 combo because it was the newest and "best flowing" parts nissan made, and who could say no to that added engine efficiency with the tight quench the combo offers. but the biggest downfall i see is the low c/r these two combined offer. i would prefer not to mess with milling head, or some strange piston/rod combo that ive read about a couple times to get a higher c/r on my engine now. i know you guys are probably saying in your heads, "why the heck do you want higher compression with a supercharger. and heres my explanation. i have access to E85. when compensated to flow rates, this fuel is just as effective as the most expensive race fuel under 6 dollars a gallon. so why not shoot for 9:1 instead of the measly 7.5:1. looking into cost and technical skills, which i think im sufficent in, would it be best to get some bigger valves installed in my n42 head and a nice cam put in. maybe have the same set up done on one of those maxima n47 heads(for high comp. and better flow) or just stick with the n42 pair that i have now. or maybe find a 280zx engine somewhere in the world. theres so many options and its kidna bogglin my mind up. o, and btw i do plan on installing a megasquirt before any sort of boost touches my engine.