Carb to Manifold Install

[khryslerkid]

I have an older manifold that I'm installing 650 Eddies onto. Going with 1" spacers for linkage clearance and heat dissipation.

The spacers have all four holes the same. (secondary diameters)

Should I bore the primary holes in the manifold to match the spacer, or sleeve the spacers to match, or just install as is?

 

[threewood]

On my Poly I bored the holes to match the pheonoletic (sp?) 1" spacer, using an Eddy 1407.