It has already been said, but it is important enough to say it again, you have what should be a great handling car. If it is not, something is either worn or just adjusted wrong.
Do a search here on FABO for the Skosh Alignment chart and then get the car to a good muscle car friendly alignment shop. Figure the handling issue out first, then work on the brakes.
and an easy way to get front disks and keep the SBP is to go with the OE style Kelsey Hays calipers and disks. Do research on the KH disk brakes, I think that I read that some of the parts are shared with early Ford Mustangs so may be re produced and available through vintage Mustang part retailers.
