Holley Fuel Line Metering Block Modification

[bkmont]

Can somebody tell me what would be the purpose of adding this fitting to the fuel line metering block?

 

[Dave Nelson]

Maybe fuel presure gauge?

 

[clill]

My guess would be for a gauge at some point in the past but all he had for a plug was what you see.

 

[al8apex]

I agree, fitting for a gauge. He has it capped off, so maybe it was added to "tune" the car with a gauge and not have one attached to the cowl vent openings ...

Then it can be closed most of the time.

 

[bkmont]

Thanks guys. I think it probably was some type of fuel pressure gauge. I'm not sure if it's the original metering block so, I just bought another one to replace it.

 

[R Mitchell]

actually that is not a metering block at all..... it's a brass "Y" connector and it's sole purpose is to split the fuel line and make 2 fuel lines out of one for duel feed carburetors like the 780 Holley that came on 1970 Z28's.

 

[bkmont]

actually that is not a metering block at all..... it's a brass "Y" connector and it's sole purpose is to split the fuel line and make 2 fuel lines out of one for duel feed carburetors like the 780 Holley that came on 1970 Z28's.

Is the brass plating the correct finish for the an original 70 Z28 "Y" connector?
The one I'm replacing has some type of black finish on it.

 

[R Mitchell]

Is the brass plating the correct finish for the an original 70 Z28 "Y" connector?
The one I'm replacing has some type of black finish on it.

More than likely yours is just tarnished from years of use. The "Y" connector is not plated, it is actually a solid piece of brass and is then machined into the final "Y" connector. When you buy a new one you'll see what I mean...a solid piece of machined brass.