5 or 6 speed conversions??

I have no problem with fabrication as I have welding ability. I'm just worried about the input shaft length problem and getting the shifter in a good location.

Anyways, no matter what this is what I'm going to do with my slant. I'm going to turn it into my daily driver/cross country car and want to try and get her up to 30mpg. An OD is one of the many steps it is going to take to attempt to reach my goal.