The Mopar 383 {1962 thru 1967} ~ 'You Magnificent Bastard'
What casting#s on those heads? Valve size? Closed chamber? Love this thread!
'300 J' Cylinder Heads
Casting # .... 2402557
Design ........ Closed Chamber
Intake Valve ...... 2.08"
Exhaust Valve .... 1.74"
These Cylinder Heads were permitted to be milled to 66.5 CC's by the NHRA.
Piston Deck Height .......... {-.051"}
Gasket Thickness ............. {.020"}
This gave the 1962 383/343 HP > closer to 11.0-1 Compression with the Flat-Top Pistons.
The Clay Smith Camshaft 'Mechanical'
Lift ............ .445"/.445"
Duration ..... 284*/284*
Overlap ...... 55*
Note:
In late-1966, when the '300 J' Cylinder Heads became obsolete {not produced} or difficult to get. The NHRA permitted the 1967 440 HP #915 Cylinder Heads
to be utilized on the 1962 383/343 HP Engines.
