So far I'm not overly thrilled with my TTI conversion mounts, I'd be tempted to try the Schumacher's, but ensure they work with a/c and a car timing cover, if you do that.
I bought a complete truck engine, only to find out i needed to change out quite a bit of it to run the car timing cover and accessories. If you buy a 6.1L, that wouldn't be much of a problem.
My Moroso pan seems to work fine with the stock K and my bell housing, I haven't gotten headers in yet. For headers I plan on trying the $425 Doug's. From what I've seen, TTIs need some "finessing" to get them to fit and I much rather dent up $425 headers than $800 ones.
...That's about as far as I am right now. Most of my focus has been on the 6spd conversion.