67 chevelle questions?

[black67malibu]

Hello guys, new to the pro-touring world and I have some questions. I just bought a 67 mailbu witch came without breaks. I called Tobin from Kore3 and purchased a nice set of wilwood for the front and rear. The car currently has a crate 350 with a new TH400 and a stock 10 bolt. My question is... what would be the next thing to uprade? I want a better rear end but also need to replace the stock suspension setup. oh, and i forgot to metion that the car has a salvage title and im a little nervous about spending a ton of money on a salvage. Thanks for any help.