Roger: I have seen some aluminum plates about 1/2" thick that bolted to the trans to which the shifter control box bolted to, thus spacing the shifter to the left 1/2". Would this help you? Remember Top loaders did NOT come in small blocks.
I might addd, the photo above of my installation of the T10 does not have the correct tailhousing, but I bought the transmission for $175.00 at the time, and I fabricated the aluminum bracket to which the shifter is bolted to. I used period pictures to get the installation height correct and shift rods in correct orientation. This works perfect.
This might help:
http://http://www.toploaderheaven.co...ter_plates.htm