So your going to make one out of a regular 727 then? That stuff I do not have, might just have to buy a parts tranny, try FCBO put up a add, maybe some one has a blown one. The cables should be somewhat available, try AMS obsolete, call them though you get a better price.
But yeah. I'm highly considering the parts trans. Probably try to get one with my tax refund check next month. Looking for a big block one that way if I ever want to go big block, just swap the internals back to the BB case