So you should Gareth - everyone should.

But when presented with adequate proof to support a fact or theory then you should accept that fact or theory, even if previously you disagreed with it.

Alex

PS I did some reading on Pintos last night - the last thing you do when tuning them is modify the size of the ports. They are TOO BIG as std. This supports why a simple capacity change works. The head can flow the extra air required to fill the cylinder and make a bigger bang because of that.