I think I'm going to at least try a 38R for the experience. Then I know what to tell my friends/customers with 7.3s. Then maybe do a 468 down the road if I end up going any bigger.
I bought this used. I have a S366 I'll throw in for another $500 if you're interested. Or I have the PTE76 that came with the kit, but it has been damaged in shipping. $1,200.
Only thing I'm not real sure on would be IC pipes, but I imagine they would be close. Might give Jake a call and he might could tell you.