Haven't got any PM. Email me triniemi (at) hotmail.com. You did notice that I live in Europe?
Did some testing with Dyno2003 and Dragsim. I think 305 vs 325 head in my combination is giving up about 10hp, 10lbs-ft, 4-5 hundrets of ET and 1 mph. Not too much. Also, the engine will spend 80% of the time at the rpm range of 5000-6500 and only 20% of time at 6500-7000.