vacuum secondary carb ?

[351w fastback]

i have a mechanical advance distributor and a vacuum secondary carb. do i have to hook up a vacuum hose to the carb so it will work or not? can u use this combination?
thanks

 

[302 coupe]

the vacuum secondaries require no hose, its vacuum source is self contained in the carb body I believe.

 

[TOM B]

if its a holley you can buy different size springs for the vac secs, this will let you tune in the secondary to open sooner,a light spring or later a hevey spring.

 

[67GTA-FB429]

I have the mechanical dizzy and vaccum secondary carb on my engine and it works great.