1. New cam? then start engine, run at 2500 rpm for 15-20 mins to break-in camshaft. If any problems occur, stop eng and fix, then finish.
2. Find straight section of roadway, prefer 4-5 miles. Accelerate WOT from 30 to 60 mph then decel, no brakes, back to 30 mph. Do this 10-12 times. Four-speed, 4th gear, do not downshift. Automatic, try to not down shift, keep in drive.
3. Another method, do Step 2, then drive it like ya stole it!!
4. My method, has worked very well every time I've freshen my engine, take to drag strip and spend the day on the track. I know when the combustion chambers are sealed, the et's keep going down and mph goes up. When MPH levels out, I'm done.
After doing each step, change oil and filter.
Drive with a firm pedal, avoid prolong periods of same rpm's. Readjust valves, if needed, check/repair oil leaks, and coolant leaks.
Step 2. was very popular in the 50's & 60's, but ring technology got better, rings were made already lapped, thus, one usually drove the way they drove normally. Just keep a firm pedal.
Enjoy the ride!!