'Match Race 1969' 440 'Cuda vs 440 'Six-Barrel' Road Runner

Frank,

There were some significant differences between the 1969 440/375 HP Engine and
440/390 HP engine besides the obvious 'Six-Barrel' set up.

A} The Engine Block, Forged-Steel Crankshaft and Cast Pistons were the same.

B} But the 440 'Six-Barrel' had 'Special Forged Connecting Rods' {Casting #185135}
which were 'shot-peened' for stress relief, and Magna-Fluxed for inspection of imperfections.
In short, they were called 'A+ Select Components' or the 'Best-of-the-Best'.

C} The Cast Pistons 'Flat-Top' {10.1 - 1 Compression Ratio} were the same, but the Top Piston Ring
for the 440 'Six-Barrel' was Moly-Filled, while the 440 Super Commando was a 'standard' cast ring
made of premium grade iron.

D} There was a slight difference in the Hydraulic Camshaft Specifications, as the 440 'Six-Barrel'
was designed with a 'low-taper' profile.

Depending on who you talk to;

440/375 HP Camshaft
.450"/.458" Lift ~ 268*/284* Duration ~ 46* Overlap ~ 114* Center-Line

440/390 HP
.450"/.465" Lift ~ 276*/292" Duration ~ 54* Overlap ~ 114* Center-Line {As per; Dick Maxwell}