Inliners International Forums General Discussion Engines What adapter do I need?

So I just picked up a 390CFM holley 4 barrel for my 230 I-6. I have an offenhuaser 4bbl manifold but it does have an adapter, and the carb bolt pattern is too wide to bolt on. Do you guys know what adapter I need? Let me know if you need more info, I'm new to this stuff.