Still looking for a holley with mechanical secondaries

[us74k5]

I need an old holley carb with mechanical secondaries. I really just need the base plate off of it. Let me know if you have one, thanks.

 

[4X4HIGH]

You better specify what size carb since they are all different or at least what size butterflies. Also need to know if it's square bore or spread bore.

 

[us74k5]

Hmm... Im not 100% sure. My holley truck avenger bolts up to the intake manifold. So whatever matches that. What I am trying to do is take the baseplate off, and bolt my impco425 up to it. For the propane setup. I hope that helps.

 

[fmstruck]

Any squarebore mechanical secondary Holley over 600 cfm will work.

 

[us74k5]

Ok cool, any specific ones i should look for on ebay or something?

 

[fmstruck]

I'd start by going to your local junkyard etc. and see if they have a pile of carburetors. You want one that opens both sets of butterflies when you move the throttle lever.

 

[4X4HIGH]

I'd start by going to your local junkyard etc. and see if they have a pile of carburetors. You want one that opens both sets of butterflies when you move the throttle lever.

They won't open at the same time though since they are progressive linkage.

 

[fmstruck]

It would be better if it were progressive. Mine are 1:1 and sometimes that is a problem. It's idling.......it's off idle........Whoa, it's wide open.

 

[us74k5]

I am still looking, if anyone out there has one.

 

[uglyangelracing]

the ford pickups came stock with them in the 80s any junk yard should have what your lookin for for under $20