TWIN 3037'S NEED CUBES. Id look at robbie ward at rips for the bottom end. As for the head, jap componentry is generally junk, and alot of the guys who have built big power engines will back me up on this. Id look at BC double springs and titanium retainers, a good set of guides from supertech, BC make a valve set, but i have not physically seen them but have heard good things, if not, iskenderians or supertech can get you done here as well, id look into headwork by NAPREC, as pretty much EVERY piece of information ive read about them points to them bieng the ballsack, if its not possible, look at JHH in qld, MOPOWER in qld, Bullet is also worth a mention with thier 5 axis cnc they seem to get good flow results. The Trust/Greddy manifold with a set of naprec 50mm throttles, ID2k's or even some of NRE's new design of billet 3k fuel injectors, a suitable fuel system with at least dual 3/8 feeds and a 1/2 return, a set of the super secret camshafts from the boys at unigroup, and a twin 4 inch system, oh, and id be throwing a wet sump system at the very least at it, though with the outlay in engine componentry id look at a dry sump for sure. The rest is pretty well universal. Ecu choice is up to tuner, ignition system is up to tuner and what they are comfortable with (although, im looking at designing a plate and harness to convert the pencil style coils to a coil near plug system with LS2 truck coils with in built ignitors) Im sure there are a plethora of other things people will chime in with so just keep reading