HOW MUCH POWER DID THE L78 375-HP 396 REALLY MAKE? WAS THE 1965 L78 425-HP 396 CORVETTE OVERRATED? WAS THE 375-HP L78 396 CAMARO OR CHEVELLE UNDERRATED? HOW MUCH POWER DID CHEVY'S LITTLE BIG BLOCK REALLY MAKE? AFTER FINDING LEAKING HEADS IN PART 1, WE REPLACED THE HEADS FOR A SECOND TEST. I INSTALLED NEW 858 HEADS IN PART 2, ALONG WITH AN ELGIN REPRODUCTION FACTORY L78 CAM AND STOCK ROCKERS. I RAN THE 396 BOTH WITH LONG TUBE HEADERS AND STOCK, CAST-IRON BBC EXHAUST MANIFOLDS. CHECK OUT THE POWER DIFFERENCE THAT HEADERS MADE ON THE BBC. FINALLY WE HAVE DYNO RESULTS ON THE L78 396!

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