If you can find a part number on them:
D1AE-6090-AA 71-74 351C 2v
2V heads
Valves 2.04, 1.65
64cc
In port 2.02 x 1.65
Ex port 1.84 x 1.38
D1AZ-6049-A
D1AE-CB 71-74 351C 2v
2V heads
Valves 2.04, 1.65
64cc
In port 2.02 x 1.65
Ex port 1.84 x 1.38
D1AZ-6049-A
D1AE-GA
71 351C Mustang Torino
Valves 2.19, 1.71
64cc (Closed chamber)
In port 2.50 x 1.75
Ex port 2.00 x 1.74
D1AZ-6049-B
D1AE-GA
71 B0SS 351 Mustang
Screw in Studs w/Guide plates
Valves 2.19, 1.71
75.4cc (Closed chamber)
In port 2.50 x 1.75
Ex port 2.00 x 1.74
D1ZZ-6049-B
D1OE-6090-AB 71 302
D1OZ-6049-A
D1ZE-DA
71-72 351CJ
71 351C
Valves 2.19, 1.71
73-76cc (Open chamber)
In port 2.50 x 1.75
Ex port 2.00 x 1.74
D1ZZ-6049-C
D2OE-AB 72 460 Police Interceptor
D2OE-BA 72-74 302
Valves 1.78, 1.45
58.2cc
D2OZ-6049-B
D2ZE-A 72 351 HO
Valves 2.19, 1.71
75cc (Open chamber)
In port 2.50 x 1.75
Ex port 2.00 x 1.74
D2ZZ-6049-A
D3ZE-AA 73-74 351CJ
4V heads
Valves 2.04, 1.66
75.4cc (Open chamber)
In port 2.50 x 1.75
Ex port 2.00 x 1.74
D3ZZ-6049-A