Dont use anything from any commercial shops ( autobarn, auto1 ) as they are all shit and dont set and harden as i've stated before, talk to a panel beater/sprayer( or toffy) to get some real stuff
if you dont want to keep it to a specific cc's then rb30 + 25 head (copy front facing intakes are cheap enuff)
VQ30DET if u want head aches, stuffing around but finally a great motor
or SR20DE+T/SR20DET if you like trucks
more info on "dye C33 Laurel Dash" and cost etc pm etc