I would suggest you cut off your current stuff and get the Speedway kit. I like the weld on one but there is a bolt on one too.
Go thru the disassembly process as described in the above links. observe the difference in operation left to right. You probably don't have to take the pistons/clutch apart unless you have rust in the caliper. If that is the case I'd just replace them...about $100 each.
Make sure you have the correct hats too.