[ulwe]

Thanks,
your advice made it very OK!
My solution was to mill down my Edelbrock performer 289 intake, so the carb is in horisontal. I also made an heat insulator from "bakelit" 2-component hardened plastic, now we have 5 degrees celsius here, so this will be evaluated next summer. But with the horisontal position, it runs very OK now, next step will be to make my own, hand-made AFR gauge! Anyhow, I will try, and see if I can get it to work.

Many thanks,
Ulf