I know my primary side has jets and that 70s are a little too rich, so I am going to swap back to 68s. My question is if the secondaries have the same sort of thing? If so, are they interchangeible?

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1984 z28 w/ a 357 cu in. monster engine which is looking like the posterchild for Edelbrock with the exception of the Holley 750vac... all the suspension stuff... 9-bolt posi disk is in...

-=ICON Motorsports=-

 

It depends. Some don't have a metering block like you have on the primaries (4160 series, maybe others too). They just have a plate. The plate is not adjustable.

Some have a metering block just like the front, with jets and a second powervalve. Some just don't have the power valve.

But to answer your question, yes the jets are interchangable. Generally, the secondary jets are 4-10 sizes larger.

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