If the power transformer doesn't get infernally hot after an hour or so of operation, and it doesn't "smell hot" (emit odors from burning wire insulation or potting compound) your set is probably OK. If it does have either/both of these symptoms, either you have an overload on the heater winding (since you already cleared the high voltage windings by removing the 80 tube) or your power transformer has an interlayer short.