I haven't kept up with the changes over the years. The earlier 5.7s (through '08) had both the alt. and the AC pump up top. I see on the newer ones, the AC is still located below. Best to call TTI to ask what years those mounts were built for. If they tell you ALL years, they're full of BS.
I tried all their stuff when trying to use my stock K member. Returned it all to them and went with an AlterKtion front suspension and never looked back. Everything fits like a glove, with plenty of clearance, etc. Good luck if you're trying to use the stock K member for your project.
BTW, although I'm now using a Hellcrate engine, my project first started with a MP 5.7 and get growing from there!