for anyone following or reading this thread, here is the link the 47-54 suburban/panel buying guide/checklist/vendor list/FAQ i was looking for-

https://www.stovebolt.com/ubbthreads/ubbthreads.php?ubb=showflat&Number=529491


'53 3100 on '93 S10 chassis- 4.3V6 +4L60e
'51 suburban TBD