The best Weber inlet manifolds that I have seen are the "jatok" manifolds
that were produced by Kastner and Jim Dittmore, I believe for use on the "D
Modified" TR-4As when they first came out and were not yet legal for D
Production class racing. There are a few sets still out there and there may
be plans to produce more.
The TWM manifolds that I have seen, are cast to be matched to a very
large intake port. They are definitly not the "hot tip." I have not seen any
Cannon manifold off of the car so cannot speak to their inside contours.
Regards,
Greg Solow
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