Here is my experiences with this situation. If you buy an Art Carr one piece input shaft you will have to have an Art Carr converter. I have a PI solid shaft and it will work with any convertor.
Convertors.. I had a B&M holeshot(when stock) and thought it was a good unit(B&M shift kit at the time). I bought a lockup PI convertor after the engine change and was miserable. The car ran like ****. PI said it was a tuning problem but would refund my money. I sent it back and had it recalibrated to a 2800(from 3000) and non-lockup(one time free change with purchase) and added a lentech valve body at the same time(at the suggestion of lentech) and all I can say is WOW. The car is sooo much faster(seat of pants) and runs better than before. Gas mileage, slightly worst with a non-lockup?? *cough*BS*cough* I hardly drive the car lately because of the gas mileage(couple other reasons too though). Big difference in gas mileage.
I couldn't be happier with the lentech unit. I hardly ever use od around town anyhow, if you do you have/will have a problem anyhow. Using od around town will cause the od to burn out. The Lentech unit will allow you to hold any/all gears to whatever rpm you want and that makes one hell of a big difference.
Mach1, it will shift into od at full throttle after a certain speed. I like to have control of what the car is doing and I appreciate what the Lentech unit alllows me... an auto/manual tanny.
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