[JUDGE3]

If thats the same Trans Am as your pic with the warbird wow, thats the nicest 81 I think iv'e ever seen. and I noticed the nice engine specs and power it must be making.

engine out for winter may be a good time to beef up that driveshaft with that kind of power.

heres my original steel 73 firebird driveshaft I had cut to remove the weaker original 1310 u joints and had 1350 series welded on with a new forged sonnax yoke and all rebalanced.

depending on your differential u may need to change the yoke there out to 1350 also.

those vibrations can make u un nerved for sure. specially showing up at 60+ mph