I currently run these headers on my car with no problems, it is a raised block not a low deck. My concerns are that the headers are designed for original spark plug location, not the angled plugs on the Edelbrock heads. What headers does everybody run with Edelbrock aluminum heads on there 440's in an A-body? Surely im not the fist person who upgraded there stock 440 head with the Edelbrock units only to find out there proparts headers dont fit.