The Master Cylinder
Well-known member
Just what you need. An adaptor to mate your Model A transmission to a BIG BLOCK CHEVY... 

https://www.ebay.com/itm/Model-A-Fo...158497&hash=item46940b8a87:g:nq8AAOSwTKRcuv8n
https://www.ebay.com/itm/Model-A-Fo...158497&hash=item46940b8a87:g:nq8AAOSwTKRcuv8n