I have been looking for a set of used k planes for my Magnum Sedan and came across a set of what i believe to be K300s tabs, the 280s and all the others are tapered towards the rear is there an advantage or disadvantage to either?
these are what i found, are they any good, or should i keep looking for a set of 280s/

They also have the old style 2 piece housing rams with the 4 bolts in the middle, and problems with these?

As long as your drives clear the tabs when they turn, bolt them on and go.