I have a 3x8 drivetrain on my mountain bike. Shimano hubs, Shimano cassette, and a 3 ring Sachs crank from circa 1995. I use Rapid Fire shifters.

I wish to install a new crank with the hollow bottom bracket spindle that will work with the rest of the drive train. Will the current Shimano 10 speed triple MTB XT cranks work with my current front derailleur setup and 8 speed chain? Are the chain wheels on the crank spaced the same as on an old triple crank that was made for a wider chain?

Any help would be appreciated.