these setups have been around for a while (at least 5 years). They have a reputation for having reliability issues. Don't get me wrong, it has been done successfully by a few, but it is very rare to get more than 15-20k miles out of one of these engines. Why not just buy a H22A? By the time you get done building the engine you will have twice as much money tied up in it... If you want something reliable, find a jdm F20B (DOHC VTEC). It's pretty much a destroked H22A type S. It has 200hp, and with the right tune these things make damn good power. Also, it has steel sleeves instead of FRM like the H22A. If I was still into honda's I would definitely go with a F20B or H22A over the "G23"...