g741.org

On the 708. It was only 91° at lunch, so I crawled up under the sucker, blasted it with Kroil, and drug out the rachet and 9/16" socket. I lasted about ten minutes, gave up, and went home to soak up some air conditioning. By 5 o'clock it had cooled down to 89° so I tried again, this time sitting on a stool instead of lying in the gravel. Got 3 of the 4 bolts out. Gonna have to drill the head off the 4th tomorrow morning before it gets too hot.

Jim,
I would just snap off the old heads and use fresh fasteners-saves a lot of sweat.
Gary

I'll be using fresh fasteners, but the old heads don't snap off.
Edit - I got it done today.

Trial fitted replacement passenger side running board. My front support bracket is bent slightly aftward, so will need to straighten that before bolting in.
Where can I get large head carriage bolts in 5/16-18x1" ?

Since the correct bolts aren't readily available, I used elevator bolts. The head is the right diameter. But is flat. I get them at my local hardware store. (McFadden-Dale) McMaster also has them.

I found a source for large head carriage bolts this morning. Ordered 25.

JimC wrote: ↑Tue Jul 22, 2025 8:23 am I found a source for large head carriage bolts this morning. Ordered 25.

How about sharing that source?

5/16×18×1.25" large head carriage bolts from bolts-n-nuts

For those looking for the actual link, here it is:
https://www.ebay.com/itm/185630168180