Regarding the Dana, most serious racers would give their left nut to save 40# of unsprung weight. You're not gonna blow up an 8 3/4 road racing. It also takes more torque to turn a Dana. Not tryin' to argue, just sayin'.
I agree. And I'd run a True Track limited slip with that 8 3/4 too.
The TTI headers fit nice and snug to the bottom of the car with a little tweaking. The collectors come out perfectly through the t-bar crossmember factory " cutouts". Clearance to the left t-bar is very tight. I doubt a 1.24" bar would fit on my car without some serious header dimpling.