Im puttin a turbo 350 with a 6 inch tailshaft in my 85 iroc.. do i have to extend the driveshaft at all... and do i have to extend the torque arm mount

 

i beleive 6" tail shaft is considered the short one, you'd need the 9" (i think) to be a direct bolt in, so yes you need to do something with the torque arm and lengthen the DS. be a lot simpler and cheaper to start over with a differant trans.

 

Where are you at, I have all of the pieces for the 6 inch tailshaft TH350. Torque arm mount, torque arm, and driveline. PM me