Strongly suggest that you listen to Tech and see if you can return that cam & lifter set. If you choose to use it and it loses one or more lobes you will have circulated microscopic, highly abrasive particles throughout your engine, and you'll likely be looking at a total teardown to hot tank the block, then starting over with new bearings, rings, roller cam, etc, etc. Some of the most experienced engine guys out there say that with a flat tappet cam and today's over the counter oils it's not a question of IF the cam will fail, it's a question of WHEN.