Join Date: May 2016
Location: Sonoma County, CA
71 Chevelle TH350 to T56 Magnum Conversion: Step-by-step with pictures
Wanted to post some pictures and descriptions of my automatic to manual transmission conversion in my 1971 Chevelle, in case it was useful. This process should be roughly the same for all 68-72 GM A-bodies, but YMMV.
I'm going to gloss over the TH350 removal, as it is pretty straightforward, and focus more on the issues relating to stuffing the T56 Magnum into the car.
So the plan is to cut the tunnel out, insert larger patch with opening for shifter, design custom center console to fit over new transmission tunnel, then reinstall.
Here's the victim: 1971 Chevelle with a Dart 427ci SBC, 12 bolt rear, truetrac diff with 4.11's, aftermarket front and rear suspension from SC&C.