I would reconsider the mags. JY ones are cheap & you'd just need a mag compatible intake & possibly different pushrods. If you're dead set against them then the 302's with some home porting. You desperately need compression which the closed chambered mags/ 302's would provide. A cam from Hughes and alot of time tweaking the dist subsytems in order: initial/total to 35 (31 if mags)/springs/vac adv. May I ask why you dislike 360's? as you desperately need torque (more cubes) for your app.