A shop here in Houston campaigned an SOHC 3.4L BMW in a front engine econo class dragster for a couple of years. With 3 500CFM Holley 2BBL's on a sheet metal intake and many other mods she made about 450HP at the crank at around 8000+RPM, if memory serves. Lots of head work and many other mods. Laid the engine almost completely on it's side in the chassis. They're slanted kind of like a Chrysler slant six from the factory.

They still have it but switched to different class with a bent 8 in another chassis.

Never heard that BMW run. They said it sounds amazing.