number 4 no fuel???

[Jamescenterconsole]

Compression results
First test #1-100,#2-105,#3-115,#4-95
Second test after ATF #1-115,#2-115,#3-105,#4-100
Third test#1-110,#2-110#3-105,#4-100
Third was rounded down gage is in 5lb increments

 

[racerone]

Remove transfer / bypass covers and inspect pistons and rings.

 

[enginepower]

???-----One carburetor throat and one jet in the carburetor !-----The air / fuel splits at the reed block some goes to #3 and some to #4 cylinder.

Ok, don't know how this motor is setup but if that's the case, can rule out carb issue. Your compression numbers are not consistent. You shouldn't be losing compression on #3 by adding atf. Have you ever seen the spark plug have water on it? Could be small leakage of water in cylinder but that usually is noted with misfires. Only other things I could think of would be crank seal leaking or warped reed pedals.