As I slowly put together this 1964 Chevy Biscayne, I am discouraged to find that I am missing parts that I needed. The engine now runs. That was my first big accomplishment. Now I find that some of the linkage for the 3 speed tranny is missing. When the PO took the car apart 15 years ago he must have lost some things. My question is this: How hard would it be to change the standard transmission over to a period correct Powerglide? Would I need a different transmission support? Do I need to find a different driveshaft or have one manufactured? Can I use flexible transmission fluid lines? Is this the best way to approach this dilemma?