need some opinions here. I just finished installing new front calipers and bracket lines on the C10 last weekend, but I haven't blead the brake system yet. I'm thinking about converting the rear drums to discs. the process looks pretty straight forward, but there are so many kits out there at some many different price points that I cant decide on one. Also, I'm assuming I need a new proportioning valve for the pressure difference between drums and discs? and If I do need one, should I mount it back down where the factory one is on the core support, or relocate it next to the master cylinder?