Weber Manifold Choice

["Warren Pruitt" <warren_p@ls3p.com>]

I have a 70B with the Weber DGV and Pierce manifold and have the
opportunity to replace the manifold with a TWM manifold. The TWM has a
vacuum port and the manifold heater that splices between the heater hose. I
need a vacuum port and have been unable to find a bushing that fits the
plug on the Pierce. 

Anybody know if the manifolds performance is similar and would the manifold
heater aid fuel atomization or is it just a heater for warm-up?

Thanks.

Warren
warren_p@LS3P.com