what are you going to do with the car?? if it's a driver you'll be un happy with the 509. i had it in my R/R with a4 sp and 391 didnt come alive till 1800- 2000. idle was huh ruff. my fiend runs the 484 and everyone i talked to drop down to the 484 and was happier. or go to a comp or a reed cam
1969 Dodge Coronet R/T Convertible 1979 LiL Red x2 2012 Yellow Jacket 2006 mega cab 1977 Trailduster 1979 Trailduster