You can use either a 153 or 168 tooth early style 265-350 small block flexplate Depending on your crankshaft, you may need to drill the holes out to 1/2" and/or add two additional dowel holes. I do not remember the converter pattern, but if you get an aftermarket flex plate with the dual pattern convertor holes you will be fine.
Bow-Tie Overdrives has an easy to use set up for the TV cable (TV-EZ??) but I believe they only have them for 4 barrels.
