Frame modification to fit 700c in 26" space!

I have a bike that I want to convert from 26" to 700c. It takes disc brakes so that's not an issue and there's loads of space in the front so no problems there but the rear 700c wheel just fouls on the "brake bridge" and stay bridge. I could slightly modify the bridges with a file or cutting a bit away which I think I could happily get away with. I'll upload some pictures soon but my question is would you or have you done anything similar yourself?

The front isn't anything to do with the frame, it's the forks. But that's not a problem as you say.

Depends on the frame how structural the brake/stay bridges are. It might be risky with a frame with skinny seat/chain stays. Photos will help answer that.

Skinnier tyres? Not all 23mm tyres are 23mm.

Also a wider rim will mean the tyre will protrude less.

It's a Marin Novado hybrid type bike.

Rims are 29'er so pretty wide already. I'm trying to run 700 x 33c Racing Ralphs. If I went to 28c they'd probably fit but the guy I'm doing the job for really wants racing Ralphs!

Thanks for the reply

I would file the brake bridge - cause I believe in this

The brake bridge plays a significant structural role only when the bike is loaded
at the rear and when this load is supported at the seat stays.

Hmm....I wonder if after modifying the brake bridge I could insert a stud through the rack bosses to add reinforcement to the stays?

The chain stay bridge will clear (just) if I just drill out the insert.