First time replacing heads and weird gasket issue.

Sorry Andy, I thought you had mentioned a machine shop put it together for you.
Like DIY said above the notches have to be oriented.
trigger_andy said
I dont have a machinist, I just pulled the heads to replace a burned out valve and then did some DIY porting. Looking forward to seeing what the '73 340 is like now. Before it ran slightly better than my 318. :/
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