yep, you can either go with a frankenstein motor which is a 2.4block with the DOHC (420a)head... or just buy another motor from the junkyard or anywhere u can get one used and spend the money on building it up and bulletproofing it... Swapping in the 4g63 motor in is not practical at all... the turbo motor will drop right in, but you have to redo all the mounts and reweld reinforcements and move some stuff around... Its been done and at the end, it ended up costing more than a Modified GSX but he only came out with a STOCK GST kind of car... catch my drift... but the real question should be, IS MONEY A PROBLEM?! WITH ALL THE MONEY, U CAN DO ANYTHING U WANT..

good luck
RO