Welcome to the board! Sounds like you are off to a good start, with replacing all the fluids and already getting around. :thumbs:
We have a 70 R/T SE and have a website that documents our journey... some of the step by step pics in there may be useful to you... TwoForNow can tell you the diffenences between ours and yours cuz he has BOTH ours and yours! Just go to Google and type in "challenger restoration" .. lately we have been at the top of the list of search results (woohoo!)