2511 also is a rear mount car. It had Stainless steel side mounts, and the stock rear, when purchased.
I have been told the vendor side mounts are good for rotational support, but not total support.
I needed extra room when I upgraded my AC condenser, so I removed the rear mount. I spoke with Dennis Quella and Steve Wilkinson about this. One said it should be okay, the other said keep all three mounts.
Now, the ss mount was already showing some stress cracking prior to all this, but I went and removed the rear mount anyway. I've put an easy 4000 miles on the car since then, and things haven't gotten much, if any, worse.
I am in the process of adding a much stronger side mount system from another vendor/machinist that will be bullet proof. It is not aligning with my previous sway bar mounted plates, and we will need to redesign and fabricate new steel mounts for the new aluminum side pieces.
The bolts are 10 x 1.5
You can view the Wilkinson page with this info here:
http://tinyurl.com/54uwckWilkinson's site has the parts and accessories catalog available, page for page. It lists all parts, including the thread sizes and pitch, and is one of my well-used bookmarks. It should be on everyone's bookmarks list.
WE NEED PHOTOS of the Hall mounts before we can venture a guess on their strength, okay?
Larry