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Old 11-22-2004, 06:20 PM
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63 pontiac 389

i bought a 63 pontiac 389 (bonneville) to rebuild to my specs to drop in my 1967 firebird. it has a 66 421 in it now and the cam is just too big. i dont take it to the track i just like to have fun. (going fast in a muscle car is the best fix there is). the 389 must be rare, it came with a delcotronic transistor hei. if i rebuild this engine as is will i be happy with the performance ? should i scrap the rare hei and original 4bbl afb as well as the 71cc iron heads. and go for broke with the aluminum ?
i like to go fast and have fun, but respect the awe of the old original power these motors came with. i would hate to feel like a dweeb someday because i tore this rare gem apart !!! has anyone been down this road ? can anyone save me some tears !!!!

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Old 11-22-2004, 06:53 PM
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I would suggest on changing the cam shaft in the 421 CID engine and leaving it in the bird, nothing replaces cubic inches. that is one of the best motors pontic produced and are becoming hard to find. I'm working on a 455CID to go in my 69 bird and got some help cam slection , the 041 Pontiac grind is a good choice and H.O. performace Co. has some good grinds with great tech support, as far as the 389 goes I would store it .
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