What Stump said, it should have that metal piece on the 12 0'clock anchor nub. something is keeping the shoes from retracting: that nub (maybe) but it was OK before without it I am assuming. wheel cyl issue (but they are new which ain't a 100% guarantee but pretty high). shoes hanging up on the b plate smooth pads (I wouldn't think). You might have a helper push the pedal BARELY but firmly (a firm tap) with the drum off, repeatedly & you see if you spot anything amiss as the shoes expand.As you know dont let him push the wheel cyl pistons/cups anywhere near all the way out. After typing this I'm thinking something with where the shoes contact the b plate (or that top anchor). Holler how it goes.