Just a word of caution make sure it fits real tight!!! I had one on a 440 and had to hone it a bit as it was too tight (may because of swelling from having crank hardened) Then I thought I'll save $5 and use it on my KB crank for a 542. well it went on really easy. (could tap it on with a big rubber hammer??) well it started to rattle and worked itself oblong before welding itself to the crank and braking every main web out of the engine and the crank then in 3 pieces!! RIP 542.
I have a new fluid on my 452 and it stays there when I start my next 542 project!!