Anyone notice that the approved Dart head is iron?
Dart catalogue
Iron EAGLE s/s 23° 165cc (55-86 Std. Intake Face)
72cc Chambers – 1.940”/1.500” Valves
10021070 Bare Head
NHRA Accepted Stock/Super Stock Cylinder Head Volumes Updated June 14, 2017 Highlighted items designate recently added since last revision
Head # 10021070 Dart
Intake CC's Max 172
Exhaust CC's Max 65
Same As Stock 80-92 305; Same chamber CC's, valve sizes as head replacing intake and exhaust