Cam removal and install without removing heads?

Motor only has about 500 miles on the rebuild they put stock replacement cam back in and I now have a stall and would like more cam but don’t want to pull the motor again.

How much stall?
And what compression ratio engine.
Before you tear it apart I highly recommend a Cylinder pressure test.
Low-compression teeners are not fond of too much cam. And elevation kills 'em worse. That 701 is gonna need a lotta stall.