1970 pinion/trans yokes????

Am getting a drive shaft from deadnutson and started questioning whether I have the correct pinion yokes for my differential and transmission. So I have done some research and there are 4 different diff. pinion yokes. Long wide, short wide, long narrow and short narrow.( Long meaning 5", short meaning 4", wide meaning 1330 ujoint and narrow meaning 1310 ujoint. So the application is a 1970 M-code, 4 speed. Research shows 2V Cleveland drive shaft length is 53 1/4. 4V drive shaft length is 53 1/32. A conversation with Jim Pinkerton about drive shaft color/stripes for the M-code 4 speed would be the same as a Boss 302 shaft which is " LBTNWT" which is light blue, tan and white. SO… the ten million dollar question is WHAT size diff flange should this car have and what size transmission yoke should this car have? 1310’s or 1330’s? Thanks

Well talking with Jack at deadnutson, I need basically the same drive shaft as the boss 302 which would have the 1330 u-joint at the slip yoke and looking at boss302 pics the boss has the long 5"/wide 1330 diff. flange. Can any B2 cougar guys measure or take a picture? Thanks