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  1. Default Heads for my 400 build... #62s or #670s?

    I need some advice on heads for a street engine build.

    First of all, I'm new to performance oriented Pontiac engines. My end goal is to have a reliable (for street use) 400 to 450 horsepower 400ci for the least amount of money possible. I have some questions, and wondered if you'd give me some advice on my build. My top question right now is about heads. I have a couple friends with #62s & #670s for a good price. Both need rebuilt. I have another competent friend that will help with the rebuild. I'd like to know which heads (#62s or #670s) I should go with.

    Last edited by chrisinestes; July 23rd, 2012 at 12:19.

  2. Default

    'cause I know you all are dying to know... I went with the #62s

  3. #3
    Join Date
    Mar 2010
    Sullivan, Missouri


    I know it is a little late now, but you made a good choice.

    Had a friend that recently built a 400 for a 1969 Firebird. He was trying to decide what cylinder heads he wanted to run. He picked up a set of #62 heads. The heads worked very good with his combination and the engine has a lot of power. Now for the rearend and transmission. Going to go with a set of 3.73 gears and a slightly higher stall speed converter.

    Able to run good pump gas in the '69 and have had very good luck with the combination.

    #62 heads
    Ram Air IV spec camshaft - Elgin
    Harland Sharp Rockers
    Edelbrock Dual Plane Intake
    Holley 750 Double Pumper Carb
    Patriot 1 5/8 Coated Headers
    Rhoads Lifters
    TRW Pistons

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