Thanks for all the additional information Lynn!  Now it's time to do a considerable amount of head scratching to try and see if there is anyway of doing it without hitting the firewall, etc.  Seems like I will need two "S" bends to bring both down under the cowling and then to the collector...I wonder if the extra weight of running two tubes another 11 inches will justify any increase in hp since I really will be happy with 160 -170 hp on my 9A...

I had a great time meeting Mike Wills and seeing his project out in San Diego last night!  He has done a great job over the past 13 yrs and hearing his engine run up gave me hope that mine will soon follow (and sound that good)...just have to keep plugging away at it.

dl