tell us more about your project. I love tunnel-ram dual carb intakes if the engines designed to take advantage of the intended operational power band, theres far too many guys that assume you can throw a tunnel ram intake on about any combo and get it to work, but the truth is they are almost all intended for the upper mid and high rpm flow rates, and although its possiable to tune one to function, it won,t really be an asset to the combo unless youve designed the engine to take full advantage of the higher rpm power band. so head flow , cam timing compression , displacement and exhaust scavaging need to be carefully thought thru when planing the engine if you want to take full advantage of the intakes potential