Redline that biotch straight out of the gate and drive it like you stole it....
If it blows up... just buy another one...

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On some nights I still believe that a car with the fuel gauge on empty can run about fifty more miles if you have the right music very loud on the radio. - HST

1983 300SD - 305000
1984 Toyota Landcruiser - 190000
1994 GMC Jimmy - 203000

https://media.giphy.com/media/X3nnss8PAj5aU/giphy.gif

Drive it like you drove that Viper and it will break in real good!

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200

LOL!

Ha!

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-Justin

91 560 SEC AMG - other dogs dd
01 Honda S2000 - dogs dd
07 MB ML320 CDI - dd
16 Lexus IS250 - wifes dd

it's automatic.

Single turbo 6.7 powerstroke Burnout - YouTube

Here is a quick video of Justin leaving the shop with his fresh motor...

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2006 CL500
1969 280SE
2023 Ram 1500
2026 Genesis GV70
2007 Tiara 3200

The builder gives good advice, and I can add a couple of things.

Check fluid levels daily at first, especially the coolant. You can be sure the builder put heat tabs on the new motor for a tell tale sign if overheats. Melted heat tab means no warranty.

Let it warm up a few minutes every morning, just until you see the some movement on the temp gauge.

Don't let anyone else drive your rig, ever.

Carry some correct coolant and oil with you in case you need to replenish, and keep the receipts.

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"I was a dirty bird, Carol's not grungey - she's *****in" John Milner....American Graffiti

I used to manage an auto parts store that had a fleet of Toyota 22R powered trucks, and the drivers used to do the same thing everyday. Except that we had to pay for the motors not them.

In all the years I worked there, the only thing that killed those motors was blown timing covers because the timing chain was worn out and the drivers wouldn't check the fluids until the motor went bang.

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"I was a dirty bird, Carol's not grungey - she's *****in" John Milner....American Graffiti

If a new cam is involved in a rebuild. Keep the idle up at first to break it in. About 1500 rpms. Otherwise reasonable lighter use is good enough usually. Keep a serious eye open for leaks as well after a rebuild is also prudent. As stated there are many opinions in this area.

No worry there, that engine uses a roller cam.

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'83 300D, 126K miles.