You will get your answers as we learn more about the car, but, given a re-ring only, are you sure you want to spend that cash?
About 1K after tax with hyd roller cam and lifters, bottom gear 75 bucks, custom pushrods about 200, springs, retainers and locks another 250, and really should get end stands and new shafts at a minimum for another 300. I love an FE roller cam, but you are sitting at 1900+ to get into the roller game unless you find a used one
I don't want to talk you out of something good, but it gets pricey!