I had abs, but it is very uh... dead. Should I buy a GSR proportioning valve?

Seats are being sold, same with cluster and such. I'm trying to keep it as sleeper as will be possible with GSR brakes. 13" steelies won't fit anymore.

I have an AEM programmable engine management system on its way, that's what I'm doing ECU-wise so that it can handle the individual throttle bodies.

I would like brake swap info or a link to an DIY if you have it.