Mopar '340-X' Heads vs. Chevy 'Fuelie Heads'

duster360 said

Looks like it's gonna be close. Now, what about the later big valve heads.

Click to expand...

Castings #3782461X

These Heads came through with the {172 CC} Intake Runners.

Bill 'Grumpy' Jenkins went through many sets, to find the ones that had
6 to 8 greater CC volume.

Casting Numbers

#3782461X ......... 1960 thru 1963 ...... 283 'Fuel Injected' and 327 'Fuel Injected'
#3782461 ........... 1964 thru 1966 ...... 327 'Fuel Injected' and Special High Performance

Note:
The 1st Year for the larger Valves {2.02" Intake and 1.60" Exhaust} was
in 1964.