Testing the 273 on the dyno....

Dartswinger70 said

I think I saw a Nicks garage video where he dynoed a "Stock 340" at around 330 HP or it might have been 335.

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The Detroit guys said the 340 was more like 375HP, That was from a Hagerty special on a legendary black 340 that roamed the streets of Detroit, street raced by an off duty cop. Perhaps wishful thinking.....