I have Pro Topline heads (Pro Lightning iron, 180cc runner, angle plugs, SBC) purchased in around 2003. I believe they are New Zealand made heads. I'm having difficulty with the thread size for the temp sending unit. Do any of you know what thread size they used. I called Comp Cams (RHS) and they were no help...said they had no info on the New Zealand heads. Any help will be appreciated.

Thanks,
John

Actually I just went out and tried what Comp Cams told me, that it's a 3/8 FIP thread and they were right! My bad. The threads were just tight and I didn't think they would work.
Praise the Lord, I got one more problem solved.
Thanks,
John

John,

If you have any other questions about the heads i use to sell them drop me an e-mail.