I need to replace the top alternator support bracket adjusting bolt on my 73 L48. In my search I have found that there is more than one type of bolt head marking being used. I want to use an original bolt. I couldn't find any old threads addressing the 73 most were all pre 72. Most of the vendors are selling a repro bolt/washer set with the "WB" marking on the head saying it is correct for 63-77. I'm pretty sure that can't be correct. My car is an April 30th build car. I have checked with two other NCRS member friends of mine with April build cars. One has a bolt with just the "3 lines forming the triangle", one with the "3 lines and an S in the middle". The other has the "3 lines with the letter C with an H in the middle". I also found an original alternator bolt with the "3 lines with the TR" letters in the middle. Which one should I get? Or would any of the three orginals be fine for judging? All three bolts listed here are easily obtainable BTW.
I thought clarification on this would be helpful for other 73 restorers out there with the same issue.

I thought clarification on this would be helpful for other 73 restorers out there with the same issue.
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