High Compression 390

I think your heading in the right direction for sure.
I wouldn’t run 11-1 at your elevation and the lack of 93 adds to the issue.

While I think the catalog cam is a good pick, calling a cam grinder is also fine. I just have noticed that if you call 9 cam grinders you’ll get 9 different cams. I am not trying to put a cloud over a custom grinder. Tell them everything about the engine and the drive train in the vehicle your using and you will get what you need and a what should be a better product than guessing at this.

Yellowrose is pointing the way well for you.

AJ is able to do what he does with the help of good math and years of experience from himself and what history has taught us all. Otherwise, pushing the envelope can be dangerous and disastrous costing more money and less than what was hoped for power.

Being that I live on an island, I can get away with a bit more (murderous builds) than you can. Some crap I have bolted together and run would just simply be ether junk or undriveable 5K feet up.

Go for the intake porting and bigger carb if possible. Stick with the .050 head gasket.
Your gonna like that mill when your done. Again, I think your heading is good.