72 chevelle w ls2 need transmission help.....

[dropped72ss]

I am currently in the process of modernizing my 1972 chevelle to a ls2 from a trailblazer ss. My plans are probably to go with the edelbrock vic jr ls intake and carb to make it simple! The car is an automatic, so i figure staying with a overdrive auto would be most cost effective. I would like to install a set of l92 heads on it down the road with a nasty cam also. I don't know the differences in the 4l60 tran family? 4l80....4l80e what is the ideal transmission i should purchase? Also is there any vendors on this site that sell them? My car is basically going to be a cruiser with a little track time. I would like to try and take it to a autox someday too! Any info would be really appreciated. The rear axle ratio is 3:73 and its on 18" wheels thanks