Try a 421! Could be wrong, but I think it's the same engine block as the 389! Found in Buick Wildcats, Pontiac Grand Pricks, Bonnevilles.. They are a beast. Same size block as the 389 from what I remember. Also the 389 was available with "HO" high octane performance. Not to slight the 400. I'd go with the 389 and bore the crap out of it or if you can fit it the 421.. Doing some research, I think you will find not too many dissatisfied peddle pushers (at least with me!). By the way.. what did you get the 64 389 out of? 65 Pont GP (first car), 64 Bonneville (my canoe get this.. with a 4 sp auto, awesome) 67 Catalina (my lost honey) all had 389's. Want them all back. Still have parts somewhere! I also interchanged a 2 BBL for the 4 BBL and didn't really get appreciative increase in gas mileage (8 gals per mile sittin' in the driveway or peddle to the metal)
Tom
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Originally Posted by stoneridge
I have a 79' firebird that came with a stock 78' 400 engine in it. After bending some valves i pulled the motor and went looking for something else. I bought a 1964 389. Which stock engine would be a better base for building a moderate street buildup . Will the 389 be able to withstand a little higher rpm's.I want to take it to the local dragstrip but also drive it around town too! Generally i will only be adding bolt on parts.
Thanks for the help
Mark
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