Graham – thanks for all the info, and the offer. I need to stay to task for the time being, I already have a chain, and I think I have the spring thing licked - but put that plate off to the side, just in case . . .
Don, the next three weeks will find me in the garage – I’d love to get to Road America, but it just ain’t in the cards. Tell Dick to give ‘em hell.
Brought up earlier was the concern about stress risers on the bolt. Just to clarify how I installed this, here’s a breakdown.
I took a ¼ 28 hardened steel Allen’s cap nut and cut it off leaving just the shoulder of the shank. This I screwed in from the back of the plate. When the shoulder reaches the back of the plate, it stops, and is close enough to flush that the gasket permits clearance between the plate and the block. I backed it off and locktighted it, then screwed it back into position. It won’t pull through.
Today, I bought an aluminum spacer and tapped it ¼ 28 all the way through, and tightened it down from the front side, again, locktighting it in place. The stud is now very stable, and will encounter no wobble. Additionally, there will be no steel-to-threads contact on the eye of the spring, and the cover prevents the spring from falling off.


I could drive myself crazy engineering this fix, but gut level, I think this is more than adequate.
I had a long day at the zoo retrieving the sound system I put in for the dinosaur exhibit last May, I was up until way late last night, and you know what? I’m hitting the rack.
Cam should be here Wednesday. Doc, I hope it fits . . .