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  1. Vintage Mustang Forum
    Knowing what we know about Ford engine date codes, a matching numbers 390 engine block to a car built on 11/10/66 would be a 6J or a 6K block. Even better would be a set of heads with 6J or 6K and a month date maybe a little before block date. Ie; 6K18 block with a matched set of heads dated...
  2. Mod and Custom Forum
    Hi everyone, I bought a pair of flotek heads (Small Block Ford 180cc/58cc | FloTek - Evansville, IN) and I wanted to build a 302 with a good cam that can rev to 7000 RPM. I was reading the info on the website and it says the heads have a range up to 5500 RPM, does that mean the engine wont be...
  3. Vintage Mustang Forum
    Hello I’m refreshing a 289 out of a 1967 mustang fastback for a friend of the family’s. Oppon disassembling the heads I found one of the original valve springs was broken. There’s two different types of valve springs available one says “ after L-10 to L-14” and the other says “after L-14 change”...
  4. Mod and Custom Forum
    I have some iron headed aussie heads on my 351c and was wondering if they were still desirable? for auto x perhaps needing iron heads to hit the requirements. I have been thinking of selling mine, if you are interested what would you be willing to pay for a set of bare heads in good shape?
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