Quote Originally Posted by Don Dalton
I have just finished the build on my coupe and have tuned and finally got the right carb. set up.I have put about 15 (easy)Mi. in the neighbor hood.What is a good break in procedure on a performance engine with 450 hp,700r4, 3.70 gears,no lock out,and 750 cfm holley.

Don in Austin
I would try to vary the rpm's.
To change the oil splash.
In other words cruise at 50 mph in 3rd gear for a few miles and then shift into over drive and run it down the interstate at 70 mph.
Watch your engine temp and don't tow and advoid extended idleling.
If you have not changed your oil and filter I would to get rid of the cam lube,bearing guard etc.
I would not use a heavy weight oil at first I would try to use a 10w 30 or a 5w 30 to make sure the oil gets there quicker.
After about 5,000 miles I would run what ever you want for oil weight.
Keep in mind if it has moly or plasma moly rings it will take a long time to get the rings to seat.