I am going to be pulling the trigger on this engine soon. However I have a couple of questions. I plan on using an AOD tranny but I'm not sure which company or setup I should use? I know that I must have at least a 2000 stall converter. I also am unsure of what rear-end setup I should use, right now I just have the stock 8". Would it be wise to just rebuild the 8" or use completely different rear-end.

Here is the link to the engine: http://www.smedingperformance.com/fo...orsepower.html

The car is a 1967 Mustang Coupe

 

You have to upgrade that 8". Not too bad though, get an upgrade 8" posi unit from auburn or a detroit soft locker. I believe you can buy these from jegs. Now if you want to do this on the cheap, Mustang II's had a posi 8" diff in them, from what I remember. Junkyard time. As for the trans , what I did is talk to a reputable tranny shop and they should be asking you the approximate HP and weight and gearing of your car for the correct torque converter. Who I use is http://www.lentechautomatics.com I can only comment what I have in my car and can tell you that I have zero issues with mine for 15 years.. There are other, just as good, trany builders out there.

 

With that amount of HP I would ditch the 8 and go to an 8.8 or 9. I got one from a guy on Craig's list who parts out cars who sold me a 9 in out of a 69 for $350. Two 31 splines from jegs at $99/each and an Auburn center for $450 to add posi and I have a great rear that will hold up to that Hp. Don't waist your money on the 8. Step up to a 9