Ok, with numbers that quick you've got me convinced to go with the 40's, But i would like to know.. what size Main venturi's your running, what size main jet, etc. Since my source for getting these numbers is claimed wrong, or not street wise. Only book i have for getting these numbers is the HP book on modifying your Nissan/Datsun engine. This is where i got the 45 number from.
Thank you very much,
Ed
BTW
sourcandy@playful.com is my email.