I'd certainly think they'd sound good together, those who only think things match by the era of build are really missing the point of the hobby. No offense intended here, more of an overall thought; everyone knows how successful the 275 has been.
I've got a C-29 that goes well with any of my tube gear, although I'd have to give the sonic edge to my Marantz 7 over it in most cases.
I've also got a C-34V that practically hasn't been out of the box since it was bought in the 90's. The 33 and 34v are excellent examples of Mcintosh engineering at the time, and the best way to find audio excellence, legendary reliability, and reasonable cost goes with this series of preamps.
I'd pan a few items of that time, but the C-33 isn't one of them.
As usual, YMMV.
Mike