Thanks guys. I think we have overwhelming evidence that around 28" is the normal measurement. Now I'll just try to quit wondering why my old one was shorter :-)
Seriously, it was a completely custom motor mount, so I'm sure that's probably the reason.
RV-8, SN-80587, built, flown, sold.
RV-3B, SN-10751, rotary engine, built, flown, sold
RV-8, SN-82470, built, flown, sold.
RV-3B, SN-11351, purchased (yes it's cheating)
A&P - 2018 dues paid