I bought this Chevelle Malibu on June 12, 2008. It had a 3999289-code 1973 454-ci with a TH-400 automatic. Upgrades to the engine included a Lunati camshaft, larger valves, an intake from an '69 L-78 Chevelle and headers which bumped the ouput to approximately 300 hp. The car was originally painted Olympic Gold and had a 250-ci Inline-6 and 2-speed Powerglide transmission. When I got the car it had 396-ci engine call-outs on the fenders (which was the largest factory-installed Chevelle engine available that year; unless one went through COPO to sneak in a 427).
I never had it at the track but the previous owner recorded a best 1/4 mile time of 13.6-seconds @ over 102-mph before the cam upgrade with uncorked headers.