MSD ignition installed, now I'm thinking transmission time?

So I went to JEGS and bought the MSD 6AL box/coil kit, with BOSCH platinum plugs and new silicone wires, etc. I can honestly say, this is the most striking change I have ever seen in the performance of a slant six! (have had 3). It idles smooth, warms up quick, has even and reliable acceleration, and even has a louder and deepr exhaust note! I have had no cold-morning issues this week (40 degrees?), and it warms up riiiiight to its running temp and stays there. WOW. Anyone wanting a quick way to smooth out your motor's running attributes, THIS is the way! Oh, and $300. Installed. NICE!

Another thing is, I have been leaning toward ridding myself of the stock 904 and moving up to a later transmission with OD from a later slant six car/van. What are my options, as far as trans swaps that will bolt-up to a slant six? I really need better freeway economy (of course carb/headers will help too, that'll happen by June). I'd like to know if there's an AOD that will fit my slant without too much trouble. None of that tailshaft-bolt-on crap for $2700. That's twice what I paid for the car :) Any ideas?

-Hunter

I just installed a MSD 6a and have actually been battling some overheating issues. I'm wondering if my timing might be off. When you switched to the MSD did you have to retard timing at all? Where are you sitting with timing at idle without vacuum?

Thanks in advance!