Hey andykrow,
How many 22RE's are out there with over-sized valves, headers and free-flow cats/mufflers running 2.25" to 2.5" piping that DO NOT have a lean mixture issue? If adding headers and open exhaust on a stock 22RE was causing a serious lean fire condition, wouldn't we know about before now?
Were the injectors tested or refurbed? Like me, I assume you don't know or have not tested the fuel pressure?
Gnarls.