I have a set of heads that I got in a deal for a 351 block. I need to know what they are the casting numbers are 4 D 7, and 4 D 9. Anyone have any clues? Are they junk? If so does anyone need two good boat ancores?
A forum community dedicated to Ford Mustang owners and enthusiasts. Come join the discussion about performance, production numbers, VIN decoders, modifications, troubleshooting, power adders, DIY tutorials, and more!