Trans-Dapt's very name is a short for "Transmission Adapter".
 
Part # Product Media
0055 Pilot Bushing; GM and Chevy with 5/16" Engine Plate
Photo
$39.33
0060 Auto Transmission Adapter; 1962-up Chevy V8 to 1966-up Buick, Olds, Pontiac, Cadillac ST300, TH350-400 or 700R4 Transmission
Photo Installation Instructions
$88.57
0061 Auto Transmission Adapter; 1966-Up B. O. P. or Cad. V8 to 1962-Up Chevy TH350, TH400 or 700R4
Photo Installation Instructions
$125.60
 
http://hedman.com/images/ePIM/original/0055.jpg
http://hedman.com/images/ePIM/original/0060.jpg
http://hedman.com/images/ePIM/original/0061.jpg