1971-2 brake master and booster

[E.Furgal]

Hello.
at a junkyard crawl, I picked a master and booster off a '72 (not sure if it's a 72 as the sticker was gone and the 72 door panels could've been changed sometime in it's life)
I got everything from the pushrod out..
the booster and master are good for cores and not much else.. but the brackets and rod are useable..

my question is there seems to be 2 different set up's used in these years..
bendix and Delco Moraine Boosters
and the masters they bolt to them different the piston rod depth..
how would one tell what one he has..?
does both bolt up to the firewall bracket and rod or are they different depending on booster/master set up.
if both bolt up to the firewall bracket and push rod what set up is better?
or is one set up for 1/2 ton and one 3/4 ton..
this is a disc/drum set up.. the doner and the receiver trucks
is one set up better if a bigblock is a likelyhood.. (booster size/clearance)
I'd rather not order both type and send one set back.. I can as I work at an auto parts house as a 2nd job. but rather not.. if I can help it..


thanks for any help..