It took a couple of years to get the wrinkles sorted out of the "new" 283. In 57 the 55 and 56 265's were outrunning the bigger engine cars. All of them, 265 and 283 suffered from a bad piston design that caused the Invar anti-expansion struts to break away from the piston skirts. I've seen as many as 4 or 5 cracked OEM pistons in a single engine.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!