-- (1) I just chose to do it. It helped with weight transfer. I ran it, almost daily, on the street, and it turned 11.23 @ 123 MPH. in the 1/4. With a few tweaks, it was a high 10s car. -- (2) I had to run the torsion bars thru the headers - that was a PITA. -- If You have more questions, I'll be glad to help. - Let's do it via PMs.