this is my first ford .i have a 82 mustang .we put a 302HO n c6 trans in it .a newer rear 5 lug. but im not sure wat drive shaft will fit. can any one help?

 

This isn't a common swap so you will have to have one made. It isn't done all that much with the SBF ( you see the C6 swap more on a stroked 351 or big block) due to it's weight and it takes the sbf about 60-70hp to run it vs about 40ish to run a C4. Any hoot the C6 has a 31spline output vs the more common 28 spline of the T5/AOD/C4. So get yourself a 31spline yoke then measure yoke to yoke and get a shaft made up or maybe measure a few bone yard shafts. getting a shaft made isn't all that bad.