[DeTomaso] is the stock oil drain plug M12-1.25 or 1/2-20?

[pantdino at aol.com]

My stock oil drain plug seems to have suffered some damage to the threads closest to the hex.? 
I figured a replacement would be a no-brainer, but at Autozone they said their book showed an M14 plug for a Ford 351C, which was clearly too big and too coarse.

Both the M12-1.25 and 1/2"-20 look very similar to my plug and to each other.

I assume since this was a good old Ford engine the 1/2" plug should be the correct one, but I don't want to put in either one until I know which is correct.

I plan to inspect the threads in the sump as best I can also, of course.

Thanks,


Jim

________________________________________________________________________
More new features than ever.  Check out the new AOL Mail ! - http://webmail.aol.com