[Paul Ceasrine]

Dave,

The 383/343 HP engine was an 'early-Chrysler Race Motor', developed in late-1962,,,,,,,for the Dodge Polara 500.

It could not be ordered as an engine option in the 1962 Dodge.

It was strictly an 'over the counter' performance parts bolt-on application,
to be fitted on the 383/330 HP engine.

A few (not many) of the 1962 Dodge Polara's and 1962 Station Wagons were equipped with the 'special order' 383/330 HP 4-Barrel engine,,,,,,
also known as the 'police pusuit package'.

Included were;
* Camshaft ((Mechanical),,,(Lift .445 Intake / .445 Exhaust,,,,, Duration 294*,,,,,, Overlap 55*)
* Solid Lifters
* Adjustable Rocker-Arms, w/special locking-nuts
* High-Strength Steel Pushrods
* Chrysler 300-J Cylinder-heads (Casting #2402557) (Closed chamber 66.5 cc, with 2.08 Intake valves and 1.74 Exhaust valves)
* High-Rate Valve-Springs w/damper (100 lbs. w/valve closed,,,,,,199 lbs. w/valve open)
* High-Strength Valve Spring Retainers
* In-line Dual-Quad Cast Iron Intake Manifold
* Twin Carter AFB carburetors (500 CFM) (1 7/16" x 1 9/16")
* Special High-pressure 3-valve fuel pump
* Dual-point distributor
* Special Long-branch exhaust manifolds

Note: In May 1966, the NHRA approved the 383/343 HP engine combination for the Plymouth 'Sport Fury' and Station Wagon.

Note: In 1967, the NHRA permitted the use of the 1967 440/375 HP (#2780915) 'Hi-Po' cylinder heads on this engine.