I'm looking at some GM heads off ebay, 3917215. Right now they're only $76.00, but who knows how high they will go, but if they stay low they seem like a good price because I'm looking for closed chamber heads. Mortec lists them as:

3917215....67-68...oval..CLOSED..396, 427, 101cc chamber


Do these flow about the same as any other closed chambers? Enough for [mild] a 496? Thanks if anyone can chime in. They seem good enough but never hurts to ask.

I think a bunch of the closed chambered head guy's will say they are good one's!!

pdq67