Dear fnff3354-- Do you know the best place to find the answer to that question, or any question, about your 1963 Pontiac Grand Prix? Why right here at CarGurus.com. To quote from our site-- " The standard engine was the 389 V8 hitting either 230-hp or 303-hp with a 2-barrel or 4-barrel carb, or 318-hp with a TriPower. The 425 Trophy V8s were replaced with various 421 engines. A 4-barrel carb rated 353-hp and a High Output TriPower didn't disappoint with 370-hp. A rare three Super Duty 421s were produced at 390 and 405-hp. While obviously appealing to the sports performance fan (the 1963 Grand Prix got 0-60 in 6.6 seconds), the coupe was nicely outfitted for personal comfort as well, with power windows, vinyl bucket seats, center console, air conditioning, and cruise control." Remember to check our pages first. Good luck from Bovan.
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