I remember as a kid I would watch my neighbor build gas dragsters from the frame up using 4130 moly tubing and building all his racing motors as well, in fact Don Garlits and Don Prudomme "the snake" where his racing buddies before they became famous in the NHRA drag racing world. Anyway, one of the things that was common among theses guys was using STP on all the internal motor components when assembling there motors. I used to watch my friend open up a can of STP and spread it on all the rod bearings, cams,lifters, cylinder walls....everything! In fact we built my 427/435HP Tri power corvette motor the same way. After careful checking of clearances, torquing and resembling of the motor we would slowly turn the motor by hand. Then install the motor for our run in. Which consisted of a short period of running listening to the internals with a stethoscope. Then it was road tested at slower speeds at 50mph for about 20 minutes, allowed to cool and repeat the run in process for the first 500 miles. Change the oil make tappet adjustments,head bolt torque settings and go! At least that was the proceedure for street motors. Really basic stuff! Some people I knew would run there motors at full tilt and did not believe in a gradual break in period Which always made me shudder!