[blykins]

Sure, a SB will run at 7.5:1....that's pretty much close to what most of the cars were running in the 70's when the big smog wars/gas wars hit.

Without being force fed, it's gonna be a feat to make horsepower at 7.5:1.

However, you shouldn't have any problem swapping everything over. Besides the intake and carb, I can't think of anything else you'll need.

You might wanna look at your cam specs. Some cams are ground specifically for forced induction applications. The cam may be hindering you a little bit too.

How much hp you looking to have when it's all said and done? 300? 400?

With that being said, I think a good streetable low horsepower SBC would get at least 15-18 mpg.....just my opinion...but I'm thinking back to the days where the Monte Carlos had 305's and 307's.....with a 4 bbl.....