3 speed with overdrive swap?

[bonehead]

Happy Thanksgiving to you all, sitting around waiting for the turkey and thinkin'. I have a turbo 400 in my 1966 c-10 but it was originally a 3 speed on the column. Lately I have been thinking of converting it back to a standard shift transmission (i like to shift). I have been reading about the T-5 swaps on the forum, but I am wondering about using the stock Saginaw 3 speed overdrive trans.

I am soliciting opinions about that trans from anyone who has one now or someone who had one in the past as to their drivability and dependability. Does anyone have any experience they can share on the overdrive units? From my reading online it seems that the later Muncie overdrive units were weaker, is that true? Any info would be very helpful.

I haven't bought one yet, this is a pic from the net for reference.