I also agree with Ron50!...That would be too large all in one piece for the GOSM to cook properly...
IMHO...the ham should be separated into 2 pieces, i.e., a 'butt' portion, and a 'shank' portion, assuming that this is a 'whole' ham...
It will cook much faster in the smaller sized portions...
It must be remembered that TEMPERATURE is the determining factor that indicates when meat is properly cooked!...It's the TEMP that's important...
TIME is only a relative indication, and will vary, sometimes greatly, from one portion of meat to another...
As MAVADAKIN has stated, that 38 lb. ham will feed LOTS of people!...At 1/2 lb. per person, it would probably feed up to 60 to 70 folks, depending on how much waste there is...
Good Luck with your smoke...and Welcome Aboard the SMF!...
...We're glad to have you in our little family!...
Until later...