The stock GM 700R is 1.875" longer than the TH350 transmission. This adapter spacer when used with a 6" tailhousing 2WD TH350 (15.5" O.A.L. output shaft length) should provide a direct replacement for the 700R transmission. The TH350 output shaft will require some trimming; however, this will allow you to install theTH350 without any driveshaft modifications.
