eveyone has their own way. no way is right or wrong. once i knew a guy who would slowly pour motor oil into the carb until the motor stalled.
another bird brain i knew pulled the plugs and squirt in oil
my rule of thumb is anything over a year drain the tank. the carb bowl will evaporate onits own.
Ive left cars for 8 months at a pop during my navy days with doing nothing but taking out the bat. once i got the bowls full she always fired right up and ran fine.
the only issue i had with leaving cars for any lenght of time was with Holley carbs. the meter blocks tended to gum up and they needed a soaking to get it going.
but with stock AL carbs you wont have that prob.
3 yrs ago I made the mistate of filling my tank in the 93. she still got a 1/4 tank left as of today and it runs fine. but i did add some stabil after the first 6 months once i had realized what i did.
1970 Mach 1 San Jose built Dec 23 1969. Marti says 1 of 7. Purchased in 1987. Original family owner of the powertrain 351C 2v FMX.
1993 GT 11,000 miles, Built 2-12-93 Auto, 3:27 Axle, cloth, sunroof. Untouched except for rubber and battery, Purchased new 8-3-93. still has the factory windshield fluid and new car smell.