9.5” or 10.5” Bell housing....opinions?

I have a Centerforce II clutch behind my 340 in my 66 Valiant and I love it...shifts like a new car, nice pedal and way smoother than my dad’s stock 66 Barracuda 4-speed.

Same. Have centerforce II in my 65 Dart with very nasty 273.
She will love the ease of clutch operation even when hp is increased.
Remember my friend safety first with the ladies but every inch counts. LOL.
Don’t skimp.