Engine code on protecto plate.

[Jim D.]

I today bought a 1967 400hp, very correct. Protecto plate code for engine is T0222JCH. I know the date, 2-22, JC, 400hp 3x2, 4 speed..what does the H represent?

[Cecil L.]

Re: Engine code on protecto plate.

I today bought a 1967 400hp, very correct. Protecto plate code for engine is T0222JCH. I know the date, 2-22, JC, 400hp 3x2, 4 speed..what does the H represent?

Holley carbureted

[Jim D.]

Re: Engine code on protecto plate.

Cecil, thanks you make it soound so simple, thanks....JD

[Edward M.]

Re: Engine code on protecto plate.

Has anyone ever seen an actual engine stamped with a JCH suffix code?

[Jim D.]

Re: Engine code on protecto plate.

Mine has only the JC on the block. Not enough room on the stamp appliance for the additional number or letter?

[Edward M.]

Re: Engine code on protecto plate.

Mine has only the JC on the block. Not enough room on the stamp appliance for the additional number or letter?

That is what I was thinking.

There are a few engines (very few, in my research) that actually identify the carburetor type on the engine pad itself.

I asked one of the guys at the engine plant what was the key to deciding whether to add the carburetor type to the engine suffix code. He told me that this was usually only done when specific things had to be done to the engine because of the carburetor type.

The example he gave was that the Holley equipped four barrel engines needed carb mounting studs installed in the intake manifold, the Rochester equipped engines did not.

[Cecil L.]

Re: Engine code on protecto plate.

I have only seen the carb code on 66 pass car 4 barrell 327 and 396 engines when the rochester and holley carbs were both used at the manufacturers option. Must have been a GM thing about spreading the wealth between Holley and Rochester.

[Wayne M.]

Re: Engine code on protecto plate.

I today bought a 1967 400hp, very correct. Protecto plate code for engine is T0222JCH. I know the date, 2-22, JC, 400hp 3x2, 4 speed..what does the H represent?

Here's an example from a 1965 P-o-P; less possibility of mis-interpreting the engine code here because of the spacing between the engine code HT and the carb code H.

[John H.]

Re: Engine code on protecto plate.

The example he gave was that the Holley equipped four barrel engines needed carb mounting studs installed in the intake manifold, the Rochester equipped engines did not.

Ed -

They also required completely different intake manifolds; square-bore for a Holley, spread-bore for the Q-Jet.

[Ray G.]

Re: Engine code on protecto plate.

I today bought a 1967 400hp, very correct. Protecto plate code for engine is T0222JCH. I know the date, 2-22, JC, 400hp 3x2, 4 speed..what does the H represent?

Hello Jim;

Congratulations. How about some pics?

Ray