Definitely a Pontiac engine- - - -those horizontal rubber hoses in front of the block were common to all the Pontiac engines in the 1950s and early 60s. The Carter AFB carb is from somewhere in the middle to late 1960s, I believe, so it's definitely not original equipment. Looks like you've got somewhat of a mixmaster there, or at least an "upgrade" to some newer parts sometime during its earlier life!
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!