The basically I should find a metal head gasket, injectors, tranny and torque converter. + if i want cali and might be taft cam.

Have you ever heard using a 60mm?? neon thlottlebody on 2.2/2.5? I just took a look at my friend's neon thlottle body. the design seems as same as 2.2/2.5. i know a machine shop and he can make the thlottle body wider. Should i try this?