Dusty,
They're a Carter/Weber Progressive 2 Barrel from Langdons Stovebolt. Yeah I tried to avoid the hole in the firewall by removing the electric choke from the rear carb and reworking the linkage so it was smaller but it just wouldn't clear.
Here's before and afters of that carb.
[img]http://www.chevygmcofkc.org/Gallery/data/3021/1P6240053-med.JPG[/img]
[img]http://www.chevygmcofkc.org/Gallery/data/3021/1P6240064-med.JPG[/img]]
Several of my buddies (and I'm sure some guys on here too) will give me trouble about cuting the firewall but I was very carefull to cut it out so that it could be welded back in easily if I ever decide to go back all stock (not likely at this point).
Cosmo,
Not sure on the aircleaner yet, prob will end up being some kinda log, although I'd love to modify 3 old oil baths to put on it but the back one would have to be flat on one side.
My exhaust manifold is an early Kansas customs stock manifold split and I'm running Flowmaster 40's for mufflers.

MONGO


Mongo's Garage
Vintage GM Truck's & Parts
https://mongosgarage.com