engine issues. Cyl #5 low compression.

hello friends.
seems to me my aero is ill.
well, about desease.
this winter I got cyl#5 spark plug goes out. I use to cleane it with sandblaster, heat on hob and engine runs well, but problem gets progressively frequent. Then, I got blue smoke and dissapearing oil. I have 7 BAR comression in this cyl, and when I crank engine with starter with disabled ECM I can hear that passing #5 cyl engine crancks faster.
I understand that I probably have failed piston ore rings and it is time to remove dr. side head and see what is inside. I wanna do it with engine in doghouse.
I wanna try to pull head carefully to reuse head gasket. I know that it is a bad idea, but I wanna save some $$ and I wanna use used piston (I have one 3.0 V6 with broken block).
Well, who did it? Any tips, that can help me )))....
As for reusing the head gasket, I would say that will probably not work. I would plan on at least replacing the gasket.



