Dish top. 1.660" CH. Use R40558 or M40558 rings.
6.4L / 390 OHV V8 16V 4.050" Bore 61-71
FORD
6.4L / 390 OHV V8 16V 4.050" Bore 68-76
FORD
6.7L / 410 OHV V8 16V 4.050" Bore 66-67
FORD
FO390C | 6.4L / 390 OHV V8 16V 4.050" Bore 61-71
FORD,
MERCURY
FO390T | 6.4L / 390 OHV V8 16V 4.050" Bore 68-76
FORD
FO410C | 6.7L / 410 OHV V8 16V 4.050" Bore 66-67
MERCURY