I have three 1971 454 large oval port heads available as rebuild-able cores. Includes valves, screw in studs and springs. Good clean condition.
Casting numbers:
3993820 (date: C 6 71) 113cc
6272292 (date: L 23 71) 113cc
3999241 (date: I 8 71) 113cc
They interchange and fit any big block Mark IV engine. $75 each Call
Location: Vernon