if it were my motor. -- i would drain the current
oil. change the filter.
allow the current
oil to drain for a full 15 mins and look for any signs of water or condensation, pollutants.
refill crankcase with its full compliment of chevron Delo 400 30W/ or 15-W40
oil , replace oil filter motorcraft FL1A (buy a second filter and keep it close by)
Check torque on all items. --
A> pop out the spark plugs and with an oil can squirt a little bit of oil on the top of each piston. ( priming dry rings. )
B> eyeball spark plugs and check gap (.035 stockish ign / .044 with MSD)
C> check carb and clean out or replace (remember carbs that sit , turn to SH*@*#)
D> Pop out distributor, prime oiling system
E> re insert dist, align make sure coil is inert.
F> pop off valve covers and spin motor with starter for a couple of 5 second bursts following firing order and listen and observe for any oddness-- reinsert plugs, pop on valve cos'.
G> Fire up and run at 1500-2000 for 15-20 mins - check oil for x,y,z
H> change filter , add 1 quart oil.
I > Run for another 30 mins at variant speeds, check for evil.