67 Cuda: disappointing dyno numbers, need some advice!

Probably in the 8.5-9.0 CR range.

Just run it til the season is over.

Here’s my thoughts on what is likely in the motor...... based on the mid-90’s build timeline.....

“Trw flat tops”, Trw used to have those. Stock replacement forged piston for like a 71 360. Flat, no valve pockets, down the hole about .090”.
I used them in a 360 for my father in 1990.
That build was 8.8:1.

“455 MP cam”, From what I’ve been told, Mopar used to have a .455/.455, 272/272-112 cam for the small blocks.
It disappeared from the line up somewhere in the late 90’s, early 00’s....... but was available for the BB for a while longer.
I bet that’s whats in there.