So after the gas tank and seat were put in I started driving the truck to work occasionally. This was quite the experience given it was my first carb engine, my first manual steering vehicle...and other reasons you'll find out later.
Two things happened when I took the truck to work:
A coworker offered me $3000 or a trade for his 1963 5.0L F**d pickup. I immediately turned that offer down despite the price being quite a bit higher than what I paid. I wanted to work on my truck, what can I say.
A different coworker who has rebuilt--what he says--hundreds of Chevy engines, looked under the hood and immediately says, "that doesn't look like a 327..."
And being a newbie to the whole thing, I'd taken the seller's word and not checked numbers. And, in the guy's defense, I think he was lied to by the guy he bought it off of.
So I went home, scraped paint and gunk off and found the numbers. He was right, it wasn't a 327. The block was an early 80's 305 with 601 heads.
The good news, however, was that while I ran the numbers on the block, I also ran the numbers on the brand new carb which turned out to be a 750cfm Q-jet. So that'w as something, I guess.