Re: 1986 2.0 or 2.3 or 2.5?
Based on my LIMITED knowledge of these trucks: my guess is a 2.3L.
Do some searching on here, tons of info: the 2.3 and the 2.0 are the same just the 2.3 is a bigger bore/ pistons/rings. Not sure about the 2.5?
The only way I knew my '83 was a 2.3L was once I had a piston in my hand (wasn't hard, half the piston was in the oil pan!)
'83 Ford Ranger 2.3L 4Spd, Dual Tanks, 195/60R15's, Welded Rear End TOTALLED AT 483,211 MILES