Larry, As long as you have the tranny case with the side mount standard linkage rod set-up you should be OK.Check for three threaded holes on the tailshaft housing (triangular pattern)then any Muncie or Saginaw shifter should work.As for pulling a trailer,I'm not sure.These trannys have very similar gear ratios to a 3 spd. saggy.I would suggest reading through ALL the posts on this thread so you will have a good idea of what you're looking at.(There are 2 pages on this thread)Then if you still have questions maybe someone with experience with these trannys can help you out.As for me, I still would love to find one with the correct bolt pattern to use with my cast iron bell.The one I located just didn't have what I was looking for.
Hope it works for you. \:\)


Frank
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'69 Chevy C-20
292 4 spd. OD Offy intake Edelbrock 500cfm long tube headers 4:56 rears