No sir. I don’t believe in using them. Last one went 9.74 and lasted over 3 rebuilds. I pulled it to rebuild but my son needed the engine so we pushed our luck, spun a bearing, and broke a rod.
I have never broke a crank or had any crank issues for that matter in the 28 years I have raced. I have them on my 394 and 408. just figured it could not hurt. My machinist liked it and thought it was a good idea so why not. I have broke a rod before too. Nice build either way.