just be carfull when you do the leak down test that the valves are seated correctly, it can and will leak past them if you are not carfull. if you are getting lots of blow by (ie leak down) put some engine oil down the spark plug hole and see if that seals it, if so it is your rings, if not then it is your valves. take off the intake and listen for air rushing out if none listen up you exhaust. it has to go some where.
cheers happy hunting,
Boz