I am going to be getting a new aluminum driveshaft for my 02 M/6 SS. The stock shaft is fine but I need to shorten it so I will just get a new one made with 1350 u-joint's. My question is can I use a larger diameter tube without it interfearing with the stock torque arm and if I can what o/d will fit? I have to decide by sometime tomorrow so any help will be great...

 

I run a LPE 3.5" alum shaft with no issues..... Dont know how big you can go....

 

Yea, I'm not sure how big you can go, and it doesn't really matter if you get a good quality shaft.

I'm running a Denny's Nitrous Ready Shaft; guarenteed for life against breakage.

 

I briefly ran an ACPT heavy duty carbon fiber DS that was 3.80" diameter, and did not interfere with my Spohn TA/DS loop or with my 4" Mufflex intermediate pipe.