auto swap

[blazomatic]

I was wanting information on all the parts needed to swap in a automatic. I have the 307 3-speed on the column with a dana 20. The 3-speed started hanging up on me the other day. I would really like to have a auto. Advance Adapters makes nothing for the dana 20. So I need the whole th350 205 combo. How hard is it going to be? Does anyone have the parts for sale. I have a good th350. Can I use it with a diffrent ext. housing? On what years can I find the parts? I know I will need the auto column, brackets and cables. I would really like to have a whole truck to take everything I need off of it. But I don't think I will find a 67-72 4x4 just for parts. 73up are everywhere but they have a diffrent t-case. When I bought my blazer I also got a 71 Jimmy for parts but it is also a 307 3-speed. I have been thinking for a while about a swap. Would swapping to a 4-speed be easier? I just want rid of the on the column stuff. Thanks for any help-opinions.