I have a 72 CL350K4, and the original camshaft and rockers were pretty worn. I purchased a donor motor from a 69 CB350K0 and that motor came with a "fat cam" in it. The rockers and camshaft are in better condition so it want to use them. Will this cause any issues, and I will be also using CB exhaust pipes, not CL. My friend said that I will need to take the needles out of the carburetors that were on the CB and put them in the carburetors that are going on my CL. will that be necessary? Will I need to change anything else? Back sprocket? I only want to put my motor together once Before I install, I thought I would ask the experts. Thanks for your time.