I've a Postcard format Graflex SLR that came from a photographer in Paris, it's the only Graflex with a self capping shutter - which is a fudge as it isn't really it just has a second curtain to allow re-cocking etc. I'm converting it to take moder 5x4 style film holders but in practice have some modern continental 9x12 holders which are the same outside dimensions and 9x12 film is easy to get hold of.
These old Graflex shutters are fairly easy to service, I've done a a few. I supply shutter curtain material to one of the top US restorers, the shutter curtain in your 7x5 is about 6ft long
My choice for lenses like yours is a pre-Anniversary Speed Graphic.
Ian