Almost all engine rebuilders are crap. They do the cheapest job possible with the cheapest parts they can find, and reuse anything they can, even if marginal.

I recommend removing and tearing down the motor yourself, using the on line factory service manual, and find a reputable machine shop to machine the block/head, then buy the correct sized replacement parts (EMS is a good source), then assemble it per the fsm procedures and torques. If you are careful, you will get a superior job that way, without a lot of extra work, and you'll get out quite a bit cheaper.