Spec advice for new motor build

[dub_crazee]

Thanks for your reply

What brand pistons would you recommend? i take you point about the barrell thickness
the reason i was thinking about going sqaure port heads was ive had trouble with the oval ports sealing before....but then again the exhaust was poorly made. CSP do a suitable exhaust as their stubs are interchangable. Is that the only downside to the square port heads?

Thanks again

Deano

ps any reccomended suppliers? Ive been in contact with Stateside tuning in the UK but was also thinking about jake in the US.