What to do with a 1971 Dart?

I accuqired a 1971 Dodge Dart with 63,000 miles from my neighbor a few years ago. 225 slant six auto non-running. All i had to do was tow to my house and it was mine. He didnt want his wife getting it in the divorce! The body is in great shape with only a few small dents and minor rust along the wheel wells. Floor pans, trunk pan, and engine bay are rust free. He was going to build it into a drag car one day i think. He left the 8 3/4 third member in the trunk and i have never "reminded" him of it lol. I bought from one of my other neighbors an old motor home with a 413 max wedge thinking i might swap it in. Bought it for $100!!! I love my neighbors! I havent touched the car since i brought it home. It stills has the made in canada stickers on the door. So my question is what should i do with it? Ive never built a drag car or anything close to it. Should i continue with the RB engine swap or will it be hard to do that? i know i will need a new k-member and other things but how hard will it be to swap everything?