I can't even remember, your combination. Don't expose it,for semi obvious reasons. I had a sweet 408 short block assembled , I could not find a set of W2 heads (econo) for a 59 degree setup, available anywhere (2006-2008 ...) with a 258-270 @ .050 solid roller ,and a good single four inlet. I could do some damaging in the Chevrolet/ Ford constitutes...