If you have the 1997 registry you can look it up. If not, then take the easy way and wait until Ron(CW) sees this and he can answer it without having to look through the registry. I am pretty sure the n\first 60 CSX3XXX cars were 427 comp cars with single 4 barrels and then he went into the 428s and finished the 3000 series with 427s with dual 4s.
Ron
