ok this is for anyone that is going to do a setup like this. 2+2 with 5sp tt tranny and a FULL tt rearend suframe and diff. your driveshaft measurements are 47 1/4 (no play) from the flat spot of the diff to the tranny shaft (where the tranny gear is flush with the aluminum casing. so you should have an overall shaft should be 51" NOT 53"
this is an iformation post since no one know's this info yet.