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Auto transmission swap

Hi Everyone,
In a few weeks I will be pulling the engine and auto transmission from my 73 Manta to replace seals and gaskets which are leaking quite badly. I have done a search of past postings to see if anyone had swapped out the 3-speed stock auto tranny for a newer overdrive model but had no luck. Has anyone out there done this? Figured this would be the time to look at gaining some better fuel economy and maybe some performance. So, what are my options, if any exist?
 

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305 Posts
I plan on keeping the automatic tranny to keep the car as stock as possible. I am just looking for a possible overdrive option as long as I have everything out of the car. (yes I know car won't be stock then, but for appearance sake it will be) I have my 4sp 69GT for those days when I feel the need for speed! By the way, the GT has the Weber 40 carb on it and it gets up and goes!:)
 
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