In the limit of infinity focus, yes, you can get a good idea from 35mm metering, but for anything involving substantial bellows factor or movements etc.... usually not wise.
If you are using a 35mm camera to meter, it's best to take that meter reading and then apply the bellows factor to that reading. I do this quite often for landscapes... again, for situations with large bellows factor, beware! The 35mm cameras have the advantage of spot as well as area and average and matrix metering, which all have their plusses and minuses. Plus, if you use a digicam to meter, you can also get colour temp and scene brightness range (a histogram) and a "proof" image too.