Welcome. CP --- I suggest you make fast friends with the all time Jedi Knight of Mopar "Chryco Psycho" (who we also call "CP" from time to time) so dont be alarmed when you read:
"CP told me you can use a different yolk from a 727 tranny with no problem , the only thing to watch is the U joint size , there were 2 the smaller 7260 2 1/8 " inside & the 7290 2 5/8" inside.."
or
"CP said the pinion angle can make a HUGE difference -- for a leaf spring without ladders cal tracs etc 5*-7* nose down from the driveshaft angle , if you have 7 leaf springs closer to 5* is better"
and you think "When did I post that? was I dreaming?"
Welcome again!