300 HP out of a 318, is it possible with bolt ons?

Sadly enough, I'm at 6500 ft of elevation, yikes! Driving down to New Mexico is a noticable difference in power, dropping to around 2000 ft of elevation. For now, a 2800 stall will be the only hope for scavenging hp.
Still it's all relative, performance is just gonna be down across the board, no matter what level of build you do.