8MM retainers/locks on 5/16 valves: OK or not OK?

Not a lot of guys using oe style magnum heads much these days, but it looks like the easy work around for the semi-oddball lock situation would be to just use Chevy LS valves(if it’s an application where the stock magnum locks and oe or MP retainers won’t suffice).

Hone the guides to fit the slightly larger stem diameter, then the retainer/lock situation gets easier.
The “.100 long” LS valves would also give you a little more installed height over the OE length valves.