454 BBC Holley Sniper Baseline Dyno Surprise!
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Last week I had my 1981 C10 on the local dyno for some baseline pulls before swapping the new cam and aluminum heads. Needless to say the results were not what i was expecting.
As shown the truck is a 1981 C10 with a mystery 454 BBC (supposedly a stock 1973 truck motor) complete with Holley Super Sniper EFI, Hyperspark ignition, Edelbrock RPM air gap intake, Hooker long tube headers, and Magnaflow exhaust.