I've never done it but I helped with a Dynatrac build that did and got to see it first hand. Really, it's the only real kit out there though and so if you're wanting a 392 in your Jeep, they're kind of your only choice to go with.
That said, EVERY V8 swap will have some issues and anyone who'll tell you otherwise is full of shit. It's not the end of the world and still way cool to have but I'd by lying if I said doing this would be 100% problem free. With the swap in the Dynatrac Jeep, it had overheating and transmission issues but I think they eventually got them working better or at least, for a time.