just go up 2 numbers for each 10hp. Basically:50hp= 37N & 22F60hp= 39N & 24F70hp= 41N & 26F80hp= 43N & 28FThis info is straight from Holley tech department.Christian99 GS Anniversary Editionhttp://www.ichibanracing.com/
Christian06 GG IX MR SEhttp://www.ichibanracing.com/ is DOWN!! In between hosts.