I redid a 440 six pack motor this summer for a local car show guy, it had one of those plastic molded ones in it with the stock crank, I reused it with the new 4.25 stroke crankshaft with no issues up
I have since bought some to use on future projects up
BTW, I do make and use my own crankshaft scrapers also up

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)