727 rebuild first timer

I know there are a ton of articles and posts about this but I've never been able to piece everything together yet. I plan to rebuild my 727 (1975 duster) to handle a 408 and supercharger (6v71). I've been struggling to find a parts list to compare to the (rebuild in a box kits from bulk barn etc. I believe all I should need further to this kit is a bolt in sprag and valve body kit. Any help would be great. My location in Canada limits a new transmission being shipped and there doesn't seem to be many performace transmission builders in this area.

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