1st Comparison
1967 ...... 383/325 HP ... 325 HP @ 4800 RPM's
vs.
1968 ...... 383/330 HP ... 330 HP @ 5000 RPMs
There was a 'slight' difference in the reciprocating assemblies.
Year ................. 1967 .................................. 1968 ..............
Deck Height ..... {-.007"} Below Deck ........... {+.014} Above Deck
But, the Compression Ratio's were identical with the Flat-Top Pistons > 10.0-1
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Also, the Camshafts 'Hydraulic' were identical.
* Lift ............ .425"/.437"
* Duration ..... 256*/260*
* Overlap ...... 32*
As well as the Valve Springs {Single-Coil}
> #134 lbs. @ 1.86" > {Valve-Closed}
> #208 lbs. @ 1.43" > {Valve-Open}
Note;
The Valve-Train was noted to be the weak-link with this combination, as
the Engine would experience Valve-Float when going over 4800 RPM's.
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