From what I have heard from experts you will not see that much of a gain as a mater of fact you may lose a litle of your hole shot. You will need a diferent intake if you had a single carb. I am not sure about rotary valve plate but I believe it will be ok but if new intake does not fit than that will be your answer. Linkages that will be fun allso I am sure. unless I bought a hole complete set up for very cheap to where if I was not happy with performance I could sell it on ebay it I would not buy it. Good luck I would fix what you have or leave it alone. :cheers: