Senior Tech Team
Join Date: Dec 2016
Location: Huntington Beach
This is how I broke mine in. I fired the engine up with the cap off the radiator to get air bubbles out and I had the hose near by. I had a leaf blower blowing directly into the radiator to keep air flow going. Immediately bring the RPMs up to 1500 and hold there and fluctuate between that and 2000. Keep an eye on oil pressure and water temp and get a decent timing advance so it is not running too hot. Helps to have a buddy there for another set of eyes. Make sure to use oil with zinc additive. I used Joe Gibbs break in oil and a comp cams oil additive.
1974 chevelle with 73 laguna nose sbc 357 Brodix IK180 heads Comp Cams XE274H Edelbrock RPM airgap 650 AED double pumper, M20 muncie, Truetrac with 3.73s