Quote:
Originally Posted by KULTULZ
Well yes, but the problem is you will have full vacuum advance @ idle and part throttle (pinging). You would have to modify the system.
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Not really, it is a myth that there is any appreciable difference between "ported" and manifold vacuum in terms of the distributor advance at anything other than idle, and at idle there is no load so ping or knock is not a factor. In all other respects the distributor advance (or retard) is exactly the same.
Maximum vacuum advance at idle does have certain advantages, lower engine temperatures. Unfortunately a direct manifold connection also increases NOX emissions. Another myth is that "ported" vacuum was a smog era invention, it was touted at least as far back as 1930s publications as a way to ensure a steady smooth idle - exactly what the modern tuner will find today.