Join Date: Aug 1998
Location: Waldorf Md. USA
Re: How long for break in?
Like the others said a hydraulic roller cam does not need that type of break in. What is more important is to get the timing set, make sure the fluids are good and then go drive it to get the rings broken in. The rings need a load to properly break in and the longer you just run it without driving it the worse it could be.
Advanced Automotive Machine
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1971 Heavy Chevy - original owner
1984 Buick Riviera - original owner (Wife's car)
Team Chevelle #100