How much trouble is it to move the engine back in an 83 monte carlo? I'm able to and willing to hammer out the trans tunnel and firewall. ANyone ever done that? Also, anyone ever moved the rear end forward? I'm getting a custom driveshaft cut anyways, and I'm considering moving the rear end foward. I have adjustable upper and lower control arms. What would be required to move it? Just changing the length of the control arms? I'm going to be re-welding the spring perches anyways.