So, I'm fixing up this old boat and it might be time to make the first big change.... I've got a stock 350 with a Quadrajet that's probably due for a rebuild or a replacement. I'm not going to do any drastic engine mods so I want to look into something mild but with decent throttle response but won't guzzle the gas. Any suggestions? The Qjet is 750cfm, right? Replace or rebuild?