?'s for 454 swap in a 72 4x4 Blazer

[Big Bad 1972 Blazer]

Alright, now that I've almost got my 454 rebuilt, punched .060" and stroked .250" with a bunch of other goodies...I'm grunting right now (it'll be dyno'd soon), it's time to get the chassis ready to receive the beast. I'm looking for tips from others who've swapped in a BBC into a 4x Blazer. Towers & mounts used? Did you use a 73+ cross member? Clearance issues? Mods needed?

Here's some of the basics as to what I'm running w/ the BB...
TH350 W/ NP205
3" body, 4" suspension lift
tall valve covers for rocker arm clearance
Hedman long headers

Thanks in advance....I'll post pics when I'm done.