71 Duster blew it up !!!!

Had the car for a little over 2 years.Lots of sreet time,track about 5-6 times a year.Monstor Mopar St.Louis 3rd pass OUCH.Time to upgrade.Promax in Indy built me a 512 pump gas motor.Going to see the final tune and dyno pulls this Sunday.Looking for a liitle over 600 H.P.at the flywhheel.The cars wireing was a liitle jacked up so all new painless going in.PAINLESS?????? Also built new dash insert.I was very pleased with the way that turned out.The old motor ran best of 10.97 on street slicks thru the mufflers.