Can anybody tell me the size of the bolts that go through the pads on the bellhousing mount on a 55-59 TF truck? I want to see if I bought the right size without crawling under the truck in the cold to check. The desired answer is 1/2-13 x 3 (since that's what I bought). But now I'm afraid its 7/16. I wasn't clever enough to measure it yesterday when I was already out there.

regards,
Leon