[Tigers] Air gag intake

[Smit, Theo]

I looked up some of the manifold heights. For those that don't know, the "way
it's done" is that you lay a straightedge along the carburetor flange, and
then measure the perpendicular distance from the ruler down to the front and
rear block valley flanges on the manifold. 'A' is the front measurement, and
'B' is the rear, in inches. The carb pad is assumed to be midway between these
measurements, and the difference between A and B gives an indication of how
much tilt is designed into the manifold.

Stock: I dunno. I expect it would be similar to the Performer 289 listed
below.

          F4B: A = 4.563 B = 5.313
Performer 289: A = 3.5   B = 4.75   This is a basic 'low-rise' manifold.
Performer 302: A = 3.13  B = 4.31   Even more low-rise.
Performer 302 RPM: A = 4.3 B = 5.5
Performer RPM Air Gap: A = 4.3 B = 5.5

So we can see that the F4B is actually a pretty tall manifold, and it has less
tilt on the carb than other manifolds too. Based on that I'd expect that if
you could fit a particular carb/air cleaner combination on an F4B, it should
definitely fit on a Performer RPM or air gap manifold.

Another option would be to see if the carb flange on the manifold could be
milled down. You'd have to be careful that all of the carb ancillaries would
still clear the manifold runners, but your spacer automatically gives you a
bunch more clearance there.

Theo




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