Alrighty, gentlemen. The 351M is nearly ready to be pulled. Considerations are to be made. I am thinking of putting a Edelbrock 1906; which is a spread bore 650CFM mechanical secondary carb. That will be paired up with an edelbrock performer intake. I am considering a Thumpyr cam from Comp Cams. My concern here is the idle vacuum will be too low for my AC and power breaks. Thoughts? Recommended headers?