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You can run 11s and make decent power on a stock 2G head. Putting on a 1G throttle body and a sheetmetal intake would help alot. The 2G intake manifold is the bigger problem. You could for fairly cheap just swap on a 1G head and 1G intake manifold. People talk about how the 2G head is better for a radical port job, but I don't know anybody who actually spent the money to have it done and is running one. The port size at the intake flange isn't everything, it doesn't have to be huge like on the 1G head. It is small on the EVOs and they have no trouble making power. It is small on Honda VTEC heads and they excel at making HP at high RPMs. Port matching the 2G head to a 1G intake manifold can be done, but it takes a shit load of time and work. You have to pull metal out pretty deep into the ports to get a smooth transition to the large port size on the 1g intake manifold. You don't want to try to make the change from 1G intake port size down to 2G intake port size in an inch, air flow doesn't like having big changes in port angles.
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