Tunnel ram cam?!

I disagree that the TR “needs” anything specific for a cam to run well.

If you got a cam that was suitable for the rest of what your goals are, it will work just fine with a TR.

Offy has had some weird manifold **** through the years........ how about a couple pics looking down into the plenum.
I’d like to see what’s going on with the divider under the carbs.