Question about W2 heads.

Greetings All. Not trying to hi-jack this thread, but maybe some of y'all's thoughts on examining used W2 heads would be useful to others besides me.

I may be going to look at a set of bare W2 heads this weekend from a guy that got them from a racer friend a long time ago. He's not sure they've ever been used, but I will assume they have. I don't know the casting or part nos. yet, but he said they were not Econos.

The questions I have are:
1) What should the deck thickness be on a new, '80's-era, W2 head?
2) What is the minimum permissible deck thickness before they become just bench art?
3) What should the height be of the machined rocker stand bosses & from where is this measured?
4) Same as 3) for the valve spring seats?

For these last two, I really mean: How can I spot-check a set of heads in a dirty, dark garage with just a set of calipers to try to be sure I'm not buying something that's been modified beyond use. Thanks!



1) Measure the depth of the camber (assuming open chambers). .100-115 is about normal.
2) I've seen them have the quench side machined totally off and they were running. I prefer to stick the piston out of the bore.
3) I can't remember but it's in the small block engine book.
4) The best way is to install a valve and use a retainer to measure the seat. If you make them too deep they break into the intake port.

Chances are if they haven't been ported to death they are worth it.