Heads. What do have, $-wise, in your setup?
Reply #17 –
Just have a valve job done....as stated above, no real point in porting GT40 heads, unless you have the means and skill to DIY.
I emailed Tom Moss a week or so ago and asked about having my Cobra lower ported. He replied that even with ported GT40/P's that the heads were still the bottle neck in that combo.