Just info but you could contact the following outfit. He's been doing trans conversions for some years, apparently specilizing in Y-Blocks. Bristol services / Gary Croan in Costa Mesa CA @
garycroan@gmail.com or 949 -722- 1122 ... Note; He also advertises regularly in Y-Block Magazine looking for 58-64 Flex plates, new or good used Ring Gears & auto trans Bellhousings..