Bryan: I found mine would pull the highest G's on launch just stalling it on the brake so I just settled on that, 3.5:1 Diff and 1820 Kg's it was never going to launch hard with a 3 Litre engine short of spraying it :)
7M ports aren't "bad" as is they just need some attention to the bowls and short turn radius and remember "even" is a bonus ;)
Also DON'T port match the Header flang to the ports leave the ports smaller.
Yep there's a LOT of stress on the exhaust side of the head and sharp edges are a good place for cracks to start :(
Don't forget the short turn radius it's VERY important for flow!
From the seat into the port
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