1968 Road Runner '383' vs. 1968 Chevelle 'SS 396'

'1968' 396/325 HP 'L-35' vs. 396/350 HP 'L-34'

396/325 HP > 325 HP @ 4800 RPM's
396/350 HP > 350 HP @ 5200 RPM's

Both Big Block Chevy's had the same;
* 2-Bolt Main Block
* Compression Ratio {10.25-1}
* Oval-Port Cylinder Heads {2.07" Intake ~ 1.72" Exhaust}
* Cast Iron Intake
* Rochester Spread-Bore 750 CFM Carburetor
* Exhaust Manifolds

Difference >

The 396/350 HP had the High-Lift Hydraulic Camshaft {.461"/.480" Lift},
and the Higher Load-Rate Valve Springs {#315 lbs.}

Also, the 'L-34' had a Forged Steel Crankshaft, and better Connecting-Rods
{beefier at the large-end} with higher-strength 3/8" Rod Bolts.

And, the 'L-34' had a high-pressure Fuel Pump {7.3 - 8.5 lbs.},
as compared to the 'L-35' which had {5.5 to 7.0 lbs.}.