Used set of AFR 245 Competition small block Chevy heads. These heads were ran for three seasons, never hurt or damaged. Brodix spread port pattern exhaust, titanium retainers, .800 lift PAC springs. Thermal coated combustion chambers. Mild port work in the bowls.On a 427cid engine made over 760HP on dyno, can provide copy of dyno sheet. Call 308 493 5699