The way to look at it is....... does the combo still “make sense” with the CR lowered 3 points?

Are the heads, intake, carb, headers still appropriately sized for the engine displacement at 10.5:1?

In other words, are they still the optimal pieces for the combo at the new CR?

If the answer is “no”, then expect to take a bigger hit in power than what just the loss of CR, and reduction in cam duration would yield.

The other side of the argument is...... how much can you afford to lose and still have the combo be “good enough”....... and does that seem like a reasonable outcome from the CR loss?

I feel as though high compression is a fairly effective way to help crutch up a less that optimum combo.