What type of fluid does NHRA use

[art leong]

Originally Posted by hemidup

Thanks all. I use an old glass Pyrex burette. I've since sent the heads to 2 other reputable shops and we all came up with the same senario. My supplied factory heads are illegal. Now, I just have to make them work. Rocker arms are next. I bought an additional 40 intake and 40 exhaust rocker arms for the mix and match and hopefully find the correct stock rocker's for the correct stock ratio with a custom ground camshaft and you all know how long that could take... lobe by lobe

With our old style hemi we used to grind the tip of the valve to adjust cam lift.