For tubing, you can go with stainless 409 (it rusts), 304 (no rust), or aluminized mild steel. Choice is yours & your budget.

http://www.ebay.com/itm/2-5-45-180-409-S...c2351d7&vxp=mtr

http://www.ebay.com/itm/Vibrant-2609-2-5...75cabc4&vxp=mtr

http://www.ebay.com/itm/2-5-45-180-Alumi...7283115&vxp=mtr

A 600 DP carb would work nice.

Just some ideas.

MBHD


12 port SDS EFI