6 pack jettings

[340_6pak]

Guys;

I am tuning a 6 pack on top of a 340, and I ran across this item on the web. It talks about replacing the metering blocks with ones that have jets that can be changed without taking the fuel bowl off. (not promax)

Here is the link: http://www.hotrod.com/techarticles/speed_block_quick_jet_changes/index.html
and a quote from the article.

Instead of mounting the jet in the metering block, Hammel created a brass cartridge that screws in from the top of the block. The bottom of the cartridge holds the jet in place inside the metering block in roughly the same location as the original Holley design. The beauty of this is that the cartridge can be removed from the Speed Block without removing the float bowl. This makes for incredibly quick jet changes.

Has anyone ever tried these?

[Chryco Psycho]

yes they work just fine

[340_6pak]

Chryco;

I just reread the instructions for this product and it says:

"The metering plate is installed between the carburetor's fuel bowl and original metering block. "
http://www.dougherbert.com/adjustajetkit-p-19502.html

Shouldn't that say 'instead of', or does the original metering plate stay in there? If it does, do I remove the original jet?

[340_6pak]

On second thought, nevermind. This part has been discontinued according to the tech line.

Bummer.