[leegreen]

I'd do what you can to keep the heat off the joints & ventilate that area. Cooking the grease out seems quite likely. If the joints start binding from lack of grease the setup will want to twist and steering effort will go up.
Nothing looks greaseable and a lot of safety critical fasteners are going to be heat cycled. I'd keep a close eye on it, your setup would not leave me feeling comfortable.

You may be pushing the 30 degree angle limit most joints like that are rated for?

Can you raise that big mopar up a inch or two or offset to the other side a bit?
I'd rather deal with driveshaft ujoints wearing prematurely than the steering complexity and heat risks.

Does the manufacturer of the joints publish a heat rating? Adding a thermocouple and gauge for the first few drives might give you a better idea where you are at.