Cheapest overdrive options? A833od? 200r4? T5?

Cheapest i went was a 5 speed out of a 90s dodge dakota that was bolted up to a 3.9. ax-15 trany. The swap for me total was under 250. Even used the flywheel from the 3.9. Trany bolts right up to the 318. However have to modify the trany hump and mounting the trany, and hydraulic clutch. They say they dont last that long but ive been beating the **** out of it for about a year, even drove 4000 miles round trip to minnesota and raced it on a track and back and its holding up fine, and shifting great. buuut then again my 318 is stock roller block bottom end w/302 casting heads, aftermarket roller rockers, 600cfm carter carb and eddy intake.