Mine is set back 1” from the front of the firewall flange and side skin.
This allows 3/8” clearance behind the gear socket on the motor mount
It could be set back further if you like since the gear leg intersection fairing will cover it.
RV6, RV8 (2), RV12 & RV3 about 2/3 done.
A&P, Tech Counselor & Flight Advisor