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That honestly doesn't look like a bad job. Then again, I don't know what the 2V heads are supposed to look like. I have personally ported the head on a few of my race quads and bikes, mostly just touch-up work. Comparing my port job to a professionals was needless to say, an eye opening experience. One that I tried to replicate and failed ...
These factory heads when treated to RaceKrafters' porting expertise and state-of-the-art equipment produced stunning results. Recognizing that the Pontiac community had varied needs, Edelbrock created a replacement D-port cylinder head a couple of years ago.
Yeah, the 210HP 327 heads are definitely 1.72/1.50 valve heads with puny ports. You might get a few horses by porting them but, myself, I wouldn't really spend the time. Even if you started with a higher-perf 327 head like a 461, you can't really expect to gain much over 10HP with minor porting and polishing.
Pontiac 400 Ram Air II/IV & 455 HO, Ram Air II, Super Duty with round port heads (1968-1974) ARP 190-3601 High Performance Cylinder Head Bolts, Hex Head.
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To port match, you scribe the outline of the port from the gasket on the surface of both the head and the manifold, and then grind the entire port up and out to that point. Just short of all out porting is to have the heads bowl ported to a distance of about 1" just down from the valve seat and blended into the port runners the basic idea is to ...
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