Hedman 1 3/4 primary tube, Holley list 4780 Performer RPM intake 906 heads KB flat top pistons stock dist. with electronic conversion.Currently have 1 Mr Gasket spring in the dist. At idle its at full advance 34 degrees. I'm looking for someone who's had a similar experience and what changes remedied the situation. Certainly welcome thoughts and opinions.

Last edited by 2264PLY; 02/03/18 06:13 PM.