Has anyone tried using a RB25 flywheel on a L28, not sure about up there, but RB gear is pretty common here and it would be a lot cheaper to obtain a "used" multi-plate from a RB25 powered car, ie $1500 second hand vs $3000 new. As these multi plate clutches come with flywheels, my mechanic said it should bolt up, but may need dowels put in to centre the assembly on the crank, but he doesn't know for sure. Plans are for my engine to eventually make 400whp, which I've already collected the parts for, and am commencing the build in the coming months.
I've read that an L28 flywheel would work on a RB25, but some machining is required to open up the middle hole.
Cheers
Aaron