Thread: Jegs crate motor choices vs. local rebuilder

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I wouldn't buy either of those GM crate engines, as they're both flat tappet cam engines, and I wouldn't invest my $$$ in anything that's not hydraulic roller cam. With a flat tappet cam the risks are simply too big for eroding lobes, which then leads to trashing every bearing surface with abrasive particles. Same goes for your local rebuilder - I'd insist on a roller cam, period. One good thing about the GM Performance Parts package is the OEM GM warranty, but some of the other big companies have similar warranty packages, too, which is something your local rebuilder likely does not even want to talk about.

On the belt package, if you're sold on the integrated drive system I'd take a hard look at the package offered by RockyHinge - link here Quality At Affordable Prices High quality, small family business, and lower prices. It's V-belts, but I like them better anyway.