My original plan was to place my radiator in the back. Short coolant path, low pressure zone in the back to help pull air through, etc. But the radiator would have to compete for space with other stuff, so I've been revisiting the idea of putting it in front. So I've been checking up on coolant tube sizes, etc.
Some searching turned up these tube sizes:
1-3/8 Pantera
1-3/8 Fiero
1-1/8 X1/9 (iffy)
1-1/2 some GT40 replicas
1-1/4 hot, 2 cold New GT40
Those are probably the closest inch equivalents to metric sizes, since all of those cars were metric.
A somewhat contentious but informative thread on gt40s.com:
http://www.gt40s.com/forum/gt40-tech-en ... tions.htmlThere's one comment in the thread about the weight of the filled GT40 cooling system that was a real eye-opener. Also that Ford determined the need for such a large return line through CFD.
And another very detailed thread on a Pantera forum:
http://pantera.infopop.cc/eve/forums/a/ ... /346105744