Thanks for the info and opinions and ideas. All great advice. I have not made any decisions at all, just gathering options. I will have my X heads built if that's what makes sense after I know more. Yes, street car with good torque, streetable, not crazy, but fun, and decent enough mileage (ha ha) to drive around a bit.
I was unaware that we have a nearby O'Reilly's until now. I'll definitely stop in there.
Thanks again.