SPL310 is on the right track and asks lots of the open questions.
Because this engine hasn't been run in 15yrs AND it has a new cam the "std." breakin should be followed.
Run a "break in" wt. type
oil (Delo 10/40 is a good choice) If the wrong type of
oil is used initially, or the break-in is too easy, rings and cylinders could (most likely will) glaze and never seal properly. A fresh cylinder wall needs some medium to high engine loading to get the piston rings to seat properly for good compression but make sure you don't lug or overheat the engine. Use high quality, low viscosity
oil ,no synthetics, too slippery. If synthetics are used during initial break in the rings are sure to glaze over.
set the timing to approx. TDC +10
Prime the oil pump & the engine for a few miutes to make sure everything has been well lubed
start the engine and IMEDIATELY bring it up to above 2000 and continue to vary the RPM's every 5 mins or so between 2000 & 3000 for the next 20-30 mins.
Rings don't "get stuck" they either seat or they don't. "
mike