June 1968 ~NHRA Stock Class National Records

69 Cuda 440 said
Teblig

Are you comparing 1968 performance output and results.

Back in 1968, in Stock Class you could;
* Balance the engine internals
* Forged-True Pistons
* Dykes-type Oil Rings
* Blueprint to specifications
* 3/Angle Valve Job
* CC the Cylinder Head combustion chambers to minimum specifications
* Blueprinted Camshaft
* Stock load-rate Valve Springs
* Stock Intake Manifold
* Stock Carburetor
* Headers
* Any Rear-End Gear combination {Typically 4.89 Gears with the 340}
* 7" Wide Slicks

A 'professionally' decently built 340 in 1968 Stock Class {E/S or E/SA} were running 13.10's @ 107 MPH.

I would be totally happy with low 13s!!!. The 390 will be balanced, 9.2:1 CR, airgap intake, 750 Holley, 340/360 exhaust manifolds, 2 1/2" dual pipes, mildly ported 596 heads, custom cam with 2.02/1.6 valves, 3 angle valve job, gasket matched. The 2004R should give me a really good bottom end (probably 4:10/4:55 first gear ratio) with the lower 2004R first gear and the overdrive will keep the motor from having to go to any high RPMs. I already have 12 1/2 inch tires in the rear, 5800 RPM maximum!!

Treblig