69 Camaro - Big Block/T-400 Driveshaft too short ?

[CamarosRus]

To everyone thats trying to help me, THANKYOU!!!!!!
The 48.50 Center to Center(U-Joint)driveshaft is what I've learned to be correct for 69 Turbo 400 applications. I had no idea 2nd Gen Camaro used same.......
The only component changed in my cars drivetrain during its "renovation" was installing the attached pictured 12 Bolt.
It having U-BOLT pinion flange I'm told is wrong....This morning I received a Email, saying MANY different yokes were/are available. If we can narrow the yoke down to causing the "short" problem, who or where can I find out about a LONGER "correct" yoke??????????
Thanks so much, Chuck