Someone school me on new VS vintage Look pedals

[BryanE]

I have a pair of 1991 Look PM-66 pedals I am using on my 1990 LeMond Ventoux.
I want to get a new pair of Look pedals so I can use the same shoes for both bikes but I see where the Keos won't work with old cleats??
What models should I be looking at that will both fit the same cleat?
Thanks
Bry

[Grant McLean]

The new cleats are smaller, and lower, so not interchangeable with the "delta".

If you switch to Keos, you'll have to lower your saddle about 5-6 mm's.
Look no longer makes the 'original' style pedals, but still sells replacement
cleats, and should for time to come. There are old pedals still around, like
on ebay and such, but I'd just move on to Keo's... I really like them.

-g