Used my Xflow alternator by removing the through bolts & turning half the body to change it from left hand to right hand mounting. Raceline supplied my mounting kit & the new pulley, but needed to know the diameter of the mounting shaft. I only had 2 problems with my installation. The alternator externally mounted fan was very close to the brake union block, I fitted a slightly smaller fan giving more clearance. The drive belt supplied with the fitting kit was the wrong size, I measured the belt run with a piece of string stretched around the pulleys & got the required size from the local motor factors. Olly