Well I got myself a really bad wheel cylinder leak, I found this out when my foot went clean to the floor while trying to stop my 3/4 ton 49 chevy like Fred Flintstone. Anyways, I've been every where and nobody will touch this rear brake job, cause they say it's too hard to do. Something about the 3/4 ton axel. So I need advice to do it myself. I can buy wheel cylinders for the rear for about $50.00 a pop, or rebuild kits for about $10.00 a pop. Is rebuilding the rear cylinders that hard, or should I just replace the wheel cylinder? And do I need special tools?

Thanks in advance,
Sam