Ii have a off idle hesitation,warmed up.185 deg.Just rebuilt a edelbrock #1406/600 cfm. Replaced a very worn out holley 600. It's on my mild 318,stck bottom end,78,00 miles,performer intake,mopar elec.ignition,hughes 318 muscle cam,street carter mech. fuel pump,stock coil,msd wires,5 deg. base...