Willkommen Claus,

I checked the list and there has been approximately 50 who have visited this website from your country.
You are currently in moderation so please post several times with questions.
Later you will be able to send private messages to members.
When you post a question please identify your truck (1949 GMC 9300).
One member from Kaiserslautern has asked many questions.

Tschüss

"Adding CFM to a truck will only help at engine speeds you don't want to use."
"I found there was nothing to gain beyond 400 CFM."