What Andy said !
How you re awaken it is critical .
Drain the old oil out straightaway and re fill it with thin
DINO BASED Multi-Viscosity oils , like 10W-30 or 10W-40 .
Don't be surprised / up set if the old oil comes out brown , gray or with water in it , just let it drip a long time before re fitting the drain plug and fill it .
It's better to find a hand pump typ oiler and use it to squirt oil / ATF in between the valve springs as what usually happens is : the valve stems want to stick in their guides , this bends push rods , co$ting you time and effort before you've even begun .
Once it's full of fresh DINO oil and the valves have been oiled , then set the valve gaps and remove the spark plugs , crank it over a while , don't run it 'till the battery goes flat or the starter motor smokes , it should crank really fast with the plugs out and in a few minutes you should see oil beginning to dribble out the weep holes in the middle of each rocker , plus maybe the oil pressure gauge will lift off the peg ever so
slightly .
Gap the spark plugs to .035" , use new ones if the center electrodes have rounded shoulders . NEVER use platinum plugs in an old Tech engine .
Gap the points to .013" ~ .016" then static set the timing to ball on pointer , now you're ready to re install the spark plugs and see if she'll light off .
Following the right order makes the job easier and it'll run better too .
NO STARTING FLUID ! use a small tin can with Gasoline in it , only dribble a little bit in each time .
Once the fuel pump picks up it's prime the carby will fill quickly .
Once it lights off , keep it running at a fast clip but NOT over revving it like a Honda ~ expect HUGE BILLOWING CLOUDS of blue and white smoke until it's been running a while , then it'll prolly settle down and leave a faint blue haze behind it .
Come back here and let us know and we'll walk you though easy tune up and routine maintenance including how to repair it to stop smoking without a $1,500 overhaul .
Step by step , steady as she goes , you're going to enjoy how it runs and drives , trust me this is why
CHEVROLET handily out sold those other (who ? I dunno , who cars ?) brands 3 to 1 for 50 years....
BRAKES ! no test drives sans brakes !!

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