Unless you are ready to buy a new transmission, drop the drive shaft. It takes 10 minutes and is worth the investment in time.

 

What are you doing to the suspension-I am about to redo mine on a sixty six-would love to pick your brain about what you used and how it went-please let me know good luck Scott-

 

Just an upgrade I also went with Disc brakes in the front, I talked to a guy at opentracker suspension for my set-up the one before I got everything from mustangsplus, wasn't too hot. The opentracker guy has helped alot and alos found some moog lower control arms which arenot made anymore but are very sought after. Any questions pm me or get a hold of opentracker

 

i believe my manual on the old c4s says u can tow a maximum of 15 miles at no more than 25mph without allowing a cool downtime(the tranny will over heat since the pumps is not turning)