I put a 700R4 in my 66. It is fairly easy. You will need a new crossmember, a tv cable and a carb adapter for the cable. Depending on which PG you are pulling out, you may need a new driveline yoke or theoretically a Vega driveline has the correct yoke and is the correct length.
Check out Bowtie Overdrives web site for all of the pieces and some good tech info.
