Roller cammed motors can forgo the 20 minute torture test at 1800-2000 rpm. Just make sure it has
oil pressure and sounds good at various rpms. Don't do the whole thing at idle. I forgot to mention. get the timing set as quickly as possible after fire up. Today's piston rings seat very quickly, within the first five minutes of operation. After the first afternoon of running the motor for break in, change the
oil. Always use non-
synthetic oil the first two oil changes, non-detergent (30w or 20w-50 )if you can find it.