That is accurate. I spoke with a good number of racers running the 360/380 create engine. In an A body race car they were running low 12's to high 11's. No to the peoples here, re-read that and notice the key word, "Race Car." In other words, gutted, high gears and stall with slicks and skinnies.
The OP has a lot of good goodies on the car. But your weight, gear and tire selection is a hinderance. Swapping to an Edelbrock head is a movein the right direction and a benefit if you can get that compression ratio up. And yes to the 1.6 rockers. TAKE advantage of that heads flow!!!
Do remember that this create engine is not a race engine. The cam is a nice street grind that should beable to perform well. Not great
I'm at sea level. How about yourself?