Muncie Overdrive

[oldskydog]

Has anyone done this conversion? I've got a muncie that needs rebuilding.
http://cgi.ebay.com/ebaymotors/ws/e...m=320123623708&ssPageName=STRK:MEWA:IT&ih=011

 

[1958 delivery]

Very interesting item. No personal experience with it, in fact first time I've seen it. But it in essence turns your 4 spd into a 3spd/over drive. Big drop first to 2nd, and 2nd to 3rd, M21 ist gear 220-1 nothing to hot but the 4th overdrive allows for the 4.11 rear end with out highway hassle! I guess the only question is if there are any strength/reliability issues in 4th with high horsepower?