Yes, the HO engine was RPO L69 which was first used in the 1983 Monte Carlo SS released late into the 1983 model year.The L69 features a compression ratio of 9.5:1, 4-relief flat top pistons, a unique & relatively aggressive stock camshaft, GM PN: 14088843 hydraulic flat tappet - duration @ .050": 202/206 - max lift: .403/.415 - 115 - idle: 650 rpm. It also utilizes a performance-tuned "CCC" ECM/PROM, a knock sensor, a performance-tuned E4ME 750CFM Rochester Quadra-Jet 4 barrel carburetor, and a special, free-flowing exhaust system with large diameter exhaust manifolds, Y-Pipe, catalytic converter, and exhaust system.
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Ray White, Toronto ON
Formerly - The one and only 1973 LeMans 454 "Astro-Jet"
