Another vote for the Q-Jet, as stated above. Going racing?!? then, maybe a different approach, but I changed my '68 Chevelle from a Holley to a Q-Jet on the 396 and gained a second on my average ET in the quarter. All of my work trucks were Chevys, with 400 Mouse or 454s, and all ran on Q-Jets, tuned by an expert; best solution going in my estimation. Only thing that could be better would be a good running electronic fuel injection setup, and that would take some serious $$$ to convert you '83. Just my two cents.