Flat top. 1.511" CH. Use C93026 rings.
2.8L / 171 OHV V6 12V "S" 93.00mm Bore 83-86
FORD
2.8L / 171 OHV V6 12V "Z" 93.00mm Bore 74-79
FORD
FO171C | 2.8L / 171 OHV V6 12V "Z" 93.00mm Bore 74-79
FORD,
MERCURY
FO171T | 2.8L / 171 OHV V6 12V "S" 93.00mm Bore 83-86
FORD