[6pack] Other 10% ethanol concerns

[Pete Kronberg]

Folks,

OK, so unleaded AND 10% ethanol. In addition to carb
floats and diaphragms...should I be concerned w/ stock
valve seats and guides?
I remember a debate that raged several years ago about
not necessarily requiring valve seat upgrades for
unleaded, but at the time I don't think the advice was
in the context of 10% ethanol formulations.

I'd rather spend the money now, than incur engine
damage later. 

Thanks,
Pete