Hi i just picked up an old 12 speed Shogun Cr-mo 400 and I am interested in updating it with newer components, shifters, handlebars, brakes and such. But I am new to the sport of cycling and am not sure what to do first. It currently has stem shifters and i would like to upgrade to STI shifters if possible, but what would i need to do the swap? I understand that it would be cheaper to buy a new bike for normal people, but I am 6'11 with a 38-39" inseam and this bike is the biggest i could find without paying thousands of dollars for a custom bike. Any advice would be appreciated, Thanks.
Here are some pics if the bike: