K10's weight about as much as a biscuit tin, they don't need a lot of power to go quick. Suggesting an SR20 or anything other than an MA10ET is a tad off topic too 
I don't know many people with direct knowledge of the MA10ET. I would suggest Ed at Fusion Motorsport to be honest, he knows a shed load about the MA09ERT and plenty regarding the MA10 and MA12's plus he can carry out such work. Worth a starting point at least rather than waffling on about all the possibilities for modifications in general, as the list could get rather endless and I am sure you have something in mind both cost and involvement wise.
