Performance ideas stock 69 GMC 2500 396

[thecarguycam]

I just picked up an all original 1969 GMC 2500 Custom Camper with matching 396 and turbo 400. I have been looking at what parts i might put on it to boost performance. It has factory A/C, P/S, and P/B. So far i have an offenhauser aluminum intake with a Barry grant 750CMF holly that I am going to put on it. I want to do a cam kit, headers and exhaust. It has an HEI distributor on it already. Please suggest any ideas for the cam, headers and mufflers or any other ideas. Also I have a 78 LWB that has front discs. will i be able to use the parts off the front end of the 78 to convert the 69 to front disc?