Your lucky to be in CA,where you have a much freindlier climate towards engines sitting unused for years..here its not uncommon for one to seize up in a matter of months,especially if not garaged..but there has been cars we got running at the junkyard that sat for decades,one that comes to mind was a '56 Packard with a straight 8,that sat since 1962 when it was towed in after being rear-ended..we fired it up in 2002!..didn't take much work,we pulled the spark plugs and oiled the cylinders and broke it free with a crowbar on the flywheel teeth,once it came free we turned it over by hand a few revolutions to ensure the valves weren't stuck shut..we felt no unusual resistance so we braved using the starter and it spun freely..We drained the old oil and filled it with some "good used" oil we'd drained from the boss's Lincoln
after its last oil change,and rigged up a gravity feed gas tank from a lawn mower to it,it started after 20 seconds,and it took about 5 minutes to get it to fire on all 8,I think some valves had stuck open..once it warmed up it ran sweet,but the carb kept flooding over..after we got the carb straightened out we sold the car to a customer for 800 bucks,it didn't even smoke !..we got many engines running that sat for years,some however,only ran good for a half hour or so and then started smoking or rapping,or locked up tight..(that may be due to the fact we didn't know why many of the cars were scrapped in the first place--some may have had "junk" engines !)..
Wost looking engine I though wouldn't run ever again was one my co-worker put in his Olds Cutlass..it was a 305 Chevy from a MOnte Carlo,he had swapped the engine into it 5 years prior,after the car lost its tranny he put it in the junkyard way out back near the tree line..car had no hood,and someone swiped the 4 bbl intake,and the engine was full in the valley pan area of acorns,leaves and about 5 gallons of water came out when we hoisted it out with the loader..I was like,ya,this is a good engine!..

..but he was stubborn,he removed all the parts he needed off his old engine,flushed the 305 out good with a garden hose,and put it all together--and to my surprise it did start and run,better than I thought it would!..it did smoke some and would foul two plugs rapidly,but he was able to use it for 6 months till he found another engine that was in decent shape!..
Oh yeah--another thing--here if a vehicle has a lein,its for "life" and you have no choice but to pay it to get it titled--if that aint possible (say the guy who was owed the lein is long dead,etc)--too bad,the vehicle cant ever be registered again!..there is no "forgiveness" if back taxes are owed either--I know a guy who bought a 1971 GMC 4x4 and took 7 years doing a frame off restoration,only to discover since he hadn't paid the sales tax within the 30 day limit when he bought it,it had now grown to 800 bucks,with all the late fees and interest that had accumulated!..another friend with a mint '62 Nova had to buy another car for the numbers and title,after learning it had an "active" lein on it from 1966,that could not be paid because the guy had died in 1977!..

..I see more vechicles here in junkyards with NOTHING wrong with them,except the owners either lost the title or couldn't GET one due to leins or unpaid excise taxes,etc..its a sinful waste of good vehicles,IMO--