Z head and O head on 1973 340

@go-fish

IMO, the W2 is a lot of head for a 318.

OH! 2 last things. The expense involved with iron heads vs a W2 is a bit more but the level of performance is way higher. IMO, you have to want to run a W2 head these days because of, #2, the aluminum heads available such as the TF is a very attractive head, cost and performance wise. This is only from a view point of brand new and never used.

If you can find a good set of W2 heads already ported by someone who knows what the heck there doing, you’ll out power most aluminum heads. There other draw back they have (other than more expensive rocker gear, but OH! so worth it!) is there weight. It’s not huge in some respects. Mostly if your not chasing the money. That extra 50 lbs. up front & on top will cost you some at track. On the street, there’s really not a whole lot because most street performance vehicles still ha e steel bumpers, run A/C and such things. If there serious street machines, it’ll look like a race car with working lights and other such equipment where’s real race car does not.

When I’m asked about doing a W2 engine, I just say, “Don’t build it like your swinging for the fence but build it like your swinging for a target over the fence!
Then let it eat!”

Otherwise you can do great with an Edelbrock or like head.

Anybody out there build a W2 headed stock stroke 318?