Exhaust crossover in intake

[Cliff Ruggles]

It's a great intake without any modifications to it at all......

[Too Fast]

So I bought that intake last year.  It weighs 40 lbs!  Anyway, it now weighs 28.5 from the diet I gave it. And I will be using one of the water crossovers from one of the 2 aluminum intakes I have.

 I have not done anything to the runners or plenum, would there be any advantage to giving the secondary side an "air gap"?  Any advantage to making the circular holes under the carb oval shaped like you did on the iron one?  Should I use a spacer, if so should I use a 4 hole spacer or just a 1" open?

[Cliff Ruggles]

Be very careful when cutting dividers in dual plane intakes.  One very quickly reaches a point of no return with those things.  At most remove a very small "notch" between the secondaries or even better leave it alone and use a gasket that's open or cut out between them.

Do not use an open spacer on a dual plane intake either.  It needs to have a divider in it.  No problem with allowing one side to see the other, but fully open spacers fair poorly on dual plane intake manifolds......

[Too Fast]

Got it.  I'm gong to leave it alone.  Thanks for the advice!