Scott, I would recommend Dave Smith Engineering -- 25078 RD 196 Exeter, CA 93221 (559) 562-3500 -- call Karen or Dave there, I used one of their crank scrapers on my fairly-built 350 (solid lifter cam, roller rockers, TRW W-31 pistons, 6800 RPM) "roundy-round" engine and was quite pleased.
Take Care, SSgt Ken Snyder Kansas City, Kansas