1988 Chevy Corvette

Hi, This tim I have a problem on my car I think it call stall when I come to stop and I start to move the car want to die and some time die on me I have a head job done when it over heat 1 month ago
the car do the same thing so I took it to another shop and check it and found out the spark plug wet
and I told him to change it I thought that was from before I have a head job done after he replace the spark plug still happen so I went back and let mei check it he found the spark plug got wet again so he told me to take the car back to the person who did the head job and see why it that water in the spark plug, 2nd auto repair shop before he change the spark plug he all the fule system they are ok.