The length is just about right with the stock seal groove location on the sbc valves, of course if the valves don't have them you must cut them. In that case I prefer to cut down magnum valves for their 5/16 stem. Then use after market kohler retainers which are 5/16.
I just had one in here for an over bore, that was ported to the point that most of the intake port was made out of Belzona, no kidding.
So, no do not scrap valves, you never know who can use them.
