While it would obviously be more difficult than simply bolting on a spacer, and also obviously more expensive; significant power, economy, AND driveability could be acquired by changing your intake/carb to a genuine Chevrolet 350 spread-bore intake, and either an original Chevrolet Rochester Q-Jet designed and calibrated for the 350, or the Carter aftermarket Chevrolet TQ.
Other than time and expense, the downside of this upgrade would be losing "cool points" at the car shows to the 16-year-olds.
Jon.
The engine that's in the truck now, came to me fully assembled, as a Craigslist special
The original engine that was in the truck when I got it was also a 350, and when I tried to get it running, I quickly found out that it had more water in it than E deck of the Titanic..
I reached out on CL, and a guy nearby posted this other 350 for a good price. I threw it in the truck as-is. That's why it has quite a few oddball items on it
