Originally Posted by vinniekq2
the HEI needs to be upgraded,the stock HEI needs a better external coil.Im not sure what the 400 heads flow so get them tested and make sure the cam matches the heads.It sounds to me like a 13 second combination not 12.
Still not enough information.Are you using slicks or drag radials?
I agree with you Vinnie...but if I'm correct, these cars came out with a 750 CFM Quadrajet right from the factory and I felt that if he's done a few up grades already, he may be under carburated with his 650 Holley.
And yes, more information is always good.