sham,
wow!
90% chance I found just what ya need to move the car....
the site says it (#1056) is a tapered spacer specifically for a 1 and 11/16 AFB (which is the same as a Edelbrock) to a 1 and 7/16" bore manifold....
http://www.hotrodchrome.com/carb.html
Caution:I've never used that particular spacer so contact those folks and confirm it will work for your specific application....
for absolute best motor performance a tapered spacer isn't real smart but it will likely work more than plenty good enough will you re-build the truck....
LOL, worry about the linkage alignment "after" you have found a carb mount that works!!!
I got bored one day and made "purdy" linkage for my car, for about about $5-7 and one trip to Lowes= .0125x 1/2" aluminum bar stock, 1/4" diameter steel tubing to use for dog leg spacers (use 2 tubes to form a "box" of bar stock and spacers so it won't flex/twist) and some 3/16" stove bolts thru the tubing to tie all together....
something like I made will work,,,,