Cast or Alum.heads for racing.

My buds ol'all steel 69 Dart, 340 roller stroker 392/W-2 's full port, low 10's on stock 6 cyl. rear springs and T bars. Melo enuff to drive everyday and he did.
If your going racing, and you wanna get serious, you start w/W-2's.
The Edelbrocks are excellent for what they are, a stock replacement aluminum head.

OH, W-2 heads can be used preety much as cast, no porting, on a 360 and remain extremly streetable and torquey.