Non-syncro to syncro transmission swap help

[Martin64]

I know I've seen at least one thread here on doing a swap from a non-syncronized transmission to a syncronized transmission.

Here's what I'm up against. The syncronized transmission is (over-all) about 5 inches longer and it has a fine splined out-put shaft. Tomorrow I'm going to get a fine splined yoke to fit. But since the overall transmission length is longer, I'm thinking that I can swap out the solid front drive line for one that's a shorter and has a slip joint. Am I thinking wrong or is this one of those instances where there's 10 different ways to get the same outcome?