Excellent recommendations, as always, from JPM.
And, I will personally testify that Gironda-style dips do, indeed, call into play upper and outer as well as lower region pec fibers.
Since v-bars are all but obsolete, I adapt my form as best I can to parallel dip bars: palms resting on the butt of the handles with the knuckles of both hands facing about halfway between forward and towards each other. This form “forces” your elbows to flare out properly to recruit maximal pec activation.
Maintain the proper concave body arch with toes pointed down & chin almost resting on your chest.
Go down nice & deep before pressing up, stopping short of lockout.
I actually stop about ¾ of the way up to keep more tension on chest rather than tri’s, in which there is a tendency to happen with closer bars.
Neck presses are also extremely effective for stressing more upper pec fibers.
Larry Scott advocated doing them on a Smith.
I like doing them on a Hammer Strength flat press machine.
Drop the seat so that the handles are at about clavicle level.
Take a nice wide grip (as wide as you can), keep those elbows up, and press.
Again, stop short of lockout.
I stop well before lockout on all chest pressing movements, which increases/improves TUT on the pectoral muscle.