Godzilla-T78

I know i know its been covered a million times but I want some deffinate answers. Right now I have a choice to make. Spend 1k on a 13bre longblock in great condition with extremly low mileage and port the **** out the exhaust and make custom mounts and use a 20b throttlebody or put a 13brew back in the fd and spend 3k+ for a longblock. From what i am told intake ports are gigantic compared to fds, and waterjackets are different on the 13bre. Anyone got any input? I plan to put a t88 on the car