Haven't spent nearly as much time driving my 40 as I wanted to in the past few months. The gasket between the carb and the intake manifold developed a leak somehow so that's now fixed but my carb still isn't running how I would like it, it's a Holley 670 cfm street avenger. The carb won't stay in tune and just runs pretty bad, by the stamping on it it's rather old. So I'm more or less looking for some recommendations as to what people would do. Would you rebuild the current carb and hope that fixes it, put a rebuild quadrajet on it, try to find and fit an 80s 454 tbi intake setup on it and run fuel injection that way, or the most spendy, get a new efi kit from summit or a place like that? I'm not afraid of wiring, just looking to get it running reliably and well because the carb goes out of tune every other tank of gas and it gets frustrating. Also the current carb really doesn't like anything resembling a hill or anything angled.