Hello! A new member here, asking about a 56 Bel Air I found a few states away with limited info to share. I am told this car was originally a three speed manual. Today it has a 383 stroker and a Muncie 4 speed. Don't know anything more about the engine or the Muncie (M20 or M21???) and the guy selling it doesn't have answers either. He says it has a "highway gear". Is it safe to assume it came with a 3.70 seeing as it was born a three speed manual? If so what should I expect as far as performance at highway speeds? I am looking for a good all round driver, something I can use daily and get reasonable gas mileage and not have the engine screaming down the interstate. Is there enough info here to deliver a verdict? Thanks in advance for your help!!!!!

John