as a general rule of thumb, what is the maximum overlap recomended for a 10.5:1 compression sbc? Carbed, manual trans, etc... I'm mostly looking to keep idle speed below 1,000 RPM and still cram a big cam into it. specifically a 276/280 cam with .552/.560 lift. I'm looking at a 107 LSA but I'm thinking about maybe stepping all the way up to a 110.