ENGINE SWAP MOTOR HELP
Yes.......the engine will fit. I would suggest swapping both the engine and transmission because the SC engine has a HD transmission to take the extra power. You also need the Engine control module (computer) the hard part of these swaps is the electronics, getting the Engine module wired into the 03 body module and having all the gages etc work.
I HAVE THE TRANS ITS A 4t65eHD WILL THAT GO IN SMOOTH
And the 2003 regal is a gs which came with a 3.8 2 sc
Looking for a Used Regal in your area?
CarGurus has 3,672 nationwide Regal listings starting at $1,995.
Search Buick Regal Questions
Buick Regal Experts