I recently got some halfshafts for my TII swap into my vert, but one of them came without the grease cap on the differential-end of the shaft. Is this a common part that I can pick up anywhere, or is it one of those PITA things that ill need to make myself

 

That would be EXTREMELY difficult to make yourself....

Go to a scrap yard and pop one off - the size of the flange on 1/2 shafts where they bolt to the diff is the same (IIRC) for turbo and N/A so you could just pop one off a pooched joint (or off your old ones) and use that

 

nope, not the same size, i tried that and the cap on the NA was smaller. I wish there was a yard around me that had a TII in it, alas no...

 

I have a crapped out TII shaft, I'll look later to see if I have it still