Reference your own W&B for your aircraft, first of all. C/S and IO-360 on the nose will make it fly different than my wood prop and O-320...
That being said... I have done that exact load out in my airplane and it's, well... Noticable... It's at the aft limit if not just outside.
And Yes, I always use 80mph-ish because of my love of wheel landings and short gear. Even with a 200 Pounder in the backseat.
RV-4 N249P O-320, Dual P-Mags, Warnke Prop, GRT Sport EX