Does anyone know where to get a universal joint that fits the stock driveshaft and the yoke for the tremec tko 600 wich is a ford racing part ? thanks

Take the yoke to your local auto parts store and see if there's a conversion u-joint that will fit. The stock GM steel driveshaft will use what's called a 3G u-joint. The Ford yoke could be a 1310, 1330 or 1350 spicer.

I cant figure out what kind of u joint i need,
It seems to me that i have a 1344 ujoint stock..
But the ford racing yoke is a 1330, but i cant seem to find a conversion joint.
The "chevy" side has to be with inside locks, but the ford one with the lock on the outside..

Typically this is one of the last things i need before i can drive the car again after a total rebuild, and it gives me such a headace ;P

Spicer 1330-3R

5-793X Solid
5-212X Greasable