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Message: [QUOTE="Chris, post: 201027, member: 400"] I ran 910s out of the box without shims and smithbros pushrods. 38r/gt47 combo. Ran between 58-63psi depending on the day and the few times i logged backpressure it was right at 1:1. I never turned the motor over 3800rpms. the truck/motor had 420k miles when i bought it. It got the twins, injectors, and pump right after i bought it and i ran it like that to 440K miles. As far as i know from the receipts given to me when i bought the truck (which is a book about 3 inches thick) the valve covers had never been off. When i bought it, it had less blowby than 90% of 7.3s ive seen. After i ran the PISS out of it for 20k miles, it had about a normal amount of blowby. It did go from running 105-106mph down to 104ish mph, so i think it was finally getting a little tired. It had somewhere around 50 1/4 mile passes, over 100 mud drag passes, and im not sure how many burnouts/powerslides. Im pretty sure if i would have ever driven it easy it would have blown up lol. It did do an outstanding burnout into the shop the day i pulled it apart, so id say it was still kicking. the motor is still sitting on the floor in the shop and i never touched it since it was pulled. The headstuds are out of it now so i guess i can go pop the heads off and take a peak at it. Pistons might look like mickey mouse, or they might be fine. Ill try to snap some pics later. [/QUOTE]

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