I've got a rebuilt 400 out of a 77 LTD. I plan on using the engine in one of my truck projects. I've traded around and procured an edelbrock intake and i'm thinking of using the edelbrock 600cfm carb. My question is what carb came on the engine to start with? The only information I can find is a small tag that reads Motorcraft D70E-HB. Does anyone know how much it flowed?