Help, intake manifold

[arq]

anyone know which side of the intake manifold these go, or was it both /forums/images/graemlins/doah.gif. I lost the instruction sheet that came with my gasket kit. I am rebuilding a 1972 year engine. The year engine did not come with egr or heat exchanger tubies. They are the intake manifold restrictor thingies.

here it is 350cid,

thanks,

ARQ.

 

[4xcrazy]

I have never installed them to begin with. /forums/images/graemlins/dunno.gif

 

[1-ton]

They go on both sides. If you live in an area that gets cold in the winter, I would not use them.If your heads have no heat risers at all, then they are unnecessary to install.