I need to get a driveshaft made for a 1977 F-100 that I swapped in a 460 with C6. Anybody here that has done this with the same set up can you remember what length you went with? I have everything else in place.

Thanks in advance.

 

https://www.dennysdriveshaft.com/how_to_measure.html. Here is a printable sheet that you can use to get the correct measurement. Once you get this completed you can have your old shaft re-tubed or have a new one built. Getting a measurement from another build may work but, not the best way.
Mark.