Yes, I have but mostly durability enhacements such as Eddies heads which are basically aluminum copies of the 452/906 iron heads with durability enhacements like bronze guides,hardened seats,stainless valves ect..then a complete comp. cams k-kit and comp pro-mag roller rockers which are steel.Ross forged pistons/pins,,Manley rods,speed-pro ductile/moly rings.10.5 comp.ratio with 296/512 lift hyd. cam, and comp.929 dual springs. The engine made 538 h.p. 550 Torque. The engine was built by Matt Hensley and the transmission A-833 18-spline, built by Herb McCandless. Thanks for the nice compliment!