OK I have confirmed the following numbers:
On the brass tag on carb top: 2632 and 4200S (you all were right)
On the side of the carb body: 0-1431 and then all the patent numbers.
On the carb base plate by the idle mixture screws it is J2 4200S
On the choke pull off arm: 180-137
Then is also has Carter AFB and Made in USA on carb body.
My plan is to put this on a Corvair until winter / early summer when I hope to move to a throttle body efi system.
Last edited by keitho64; 09-05-2012 at 02:04 PM.