A friend of mine has an 8 speed Campagnolo Athena groupset that he wants to give me. My bikes is a 6 speed equipped with Shimano 600 and 27 inch wheels. I want to make this conversion as cheaply as possible. A new wheel set and long reach brakes should do, right? And do I need some kind of kit to convert the bike from downtube shifting to Ergopower? Also, the frame is a mid 80's Lotus Unique. I think I may have to have the dropouts "stretched" for lack of a better word to accommodate the new cassette. If I'm missing anything, please let me know. Thanks in advance