Spindles and Brakes for 69 Camaro?

[StilOwnMy1stCar]

Hi, I am looking for some suggestions on front disc brakes for my 69 Camaro. I will be using a 17" wheel, but like the option of going back to a 15" rim. The car will mainly be street driven, but I would like to due some track days. The problem I am having is with all the brake kits. I am being tempted to go with 13 inch rotors and hope that I will not want to change back to stock wheels. I want to be able to get replacement rotors and brake pads 10 years from now and I do not know if alot of the kits are proprietary. Also, would it be better to go with the C5 spindles that CPP offers for steering geometry or keep my stock drum spindles with Kore3 hubs and do a Guildstrand mod? Let me know if anyone knows of a competant brake setup for 15" wheels that I will be able to get repacement parts for?