I have this pan in 70 Challenger 512 in with 2 inch TTI's, not even close to any clearance issues. I recommend studs at rear main retainer. Everything else I use bolts,,,do not use ARP bolts,,,they are shorter than stock bolts(also their washers are almost like ball bearings) and are stainless(locktite does not work well) and will continually loosen. I use no sealer except very small amount at rear of pan around the retainer.

Proper torque is very important at 15 pounds. Unfortunately flimsy construction of RR pan, tightening to that torque will dimple the pan, leading to leaks. I suspect a primary reason that so many pans are slathered with silicone so as not to leak.

Makes for misery to use this stuff when you are next looking at removing pan.

This little fix that I threw together using 1/8th by 1 inch steel stock has worked very well to allow proper torquing. Perhaps a kit opportunity for some enterprising machinist.

What must I learn to be able to include multiple photos in a single posting.?