Need some help ASAP

[TimGT]

Ok so I haven't posted here in a really long time since I no longer have a Mustang.

So I got these heads after this company screwed up my motor. Well they had only opened one of them to show me and I left the other one wrapped up. Well the one they showed me was a PI CNC'd head that look brand new. Well after about 2 years of them sitting in the garage I decided to unwrap them both so I could take pictures because a guy wanted to buy them. I unwrap them both and the other one looks used and is a non-PI head The reason I didn't unwrap them both right away was because it took them a year and half for them to get me a short block and 2 years to get me the heads and by then I had already sold the car and wanted nothing to do with cars at all.

Well my question is, does it matter if one is PI and the other is a non-PI head if they were both CNC'd?

 

[SaleenGT2001]

the compression ratio will be different with a non pi head.

 

[trinity_gt]

Even CNCd, the chamber shapes are different, the port volumes are different, flow characteristics are different etc. So I'll say "yes, it matters."

 

[eliteJAE]

Wow I would crapped a brick, they basically screwed you multiple times and got away with it :/ it matters man.

 

[TimGT]

Well the chambers look like they were CNCd too, I'll post up some pics later on tonight. The only other thing I could think of that would be different is the valve cover holes.