With a good port job, and some time on a flow bench, you would be shocked to see what you would get. More so than just power, but smoother delivery, and much quicker throttle response. I'm guessing a good shop in Socal would run 2,000 for the port job, and the new goodies, larger intake valves, etc. But, that doesn't include the r&r of the heads. Add 700 more for that. We got 40 hp from my chevy b/b with porting, 2mm over intakes, and Thorley headers. Plus, as if it needed it, a ton more torque. The cam gave another 20hp. ...My guess would be an honest 25hp witha v6 taco, using new intake valves, and careful fuel map tuning. And, stone reliable.