How To 4.6 Swap a 3.8 - 3.8 Mustang Message Board It's defaintly not worth it, just keep the V6. If you want more power you can get an M90(the blower that comes on T-birds), you can find kits on Ebay pretty cheap. And people with just that and bolt-on's are running high 13's/low 14's with open differentials w/ 2.73's and shitty flowing stock single port motors.