Wanted to run engine long enough to make sure no leaks from oil,,,rear main seal and oil gallery plugs.
No radiator in and crossovers left off,
filled with antifreeze mix to the bottom of T-stat , useing a radiator hose looped from water pump housing to T-stat. Leaving enough air in hose for some expansion.
Looped a hose on pipes at rear of engine for heater hoses,,air in that hose too.
Water will circulate thru bypass hose.
.
Started and ran rough untill I turned distributor and to smooth out..
.
Total run time about 5 min. Temp. gauge not quite 1/2 way up to operating temp.
.
Bled off pressure at Radiator hose ,,,not much built up,,,water not hot enough to say ouch.
.
Hope I didn't run too long without load to seat the piston rings.
.
things are OK , I guess...onto to exhaust system install, pulley , alt., and then try to solder up my radiator.