Lovely!
But don't let Mr Tinbum look in; nasty piece of work he is when it comes to 35s!
Looks like the one on the left's an Export?
Sometimes, and especially as you have other mint condition guns, I like to keep the oldies in honest, original, worn condition. So a quick tune up and just use? Personally, I love them with a V-Mach spring and guide set installed.
There are lots of tuning variations that will work on these. Mick, T20's 25mm sleeved one is awesome. But then his 'O' ringed, longer stroke one is utterly fantastic, too, and far less work involved.
Fingers crossed that you have no leaky breech issues, as there'll be a little more work involved if so.
Lovely classic rifles; enjoy.