If you really did loose your enigine above "Few" cloud would you really look for agap to come down through?
If your nav planning was good you should be able to come down through it with out hitting something high (unless your over the Brecon beacons or the pennines)..I know it is not legal if you don't have IMC or IR but hey it is better than stalling whilst trying to eek it out to a gap.
I would much rather set best glide and fly myself through the cloud than stall and have to recover through them.
Tin hat on!