Good Deal, Decent Deal or Bad Deal?

For that kind of money Jack the pistons almost have to be reuseable. The first thing I'd do is grab the best looking piston and using a feeler guage between the skirt and cylinder wall check at the top and bottom of each hole. That'll give you your taper and if the piston is already an oversize it'll give you an idea whether the next size overbore is required. Obviously the bare block's got to be pristene also for the 1K IMO.