Well swapping the motor mounts did not help, I guess another driveshaft is next thing to try, I did see that my yolk is splined all the way inside.
When I put in my T-5 from an 89 mustang I ended up the Mustang driveshaft and using a Ford Racing M-4635-A - Ford Racing U-Joint Conversion Kits from Summit to hook it up to the 8" rear end.