The spark plug is inaccessible with a wrench due to clearance with the frame, it doesn't have stripped threads or is stuck I just can't get a socket over it
What a PITA removing the head to remove a S/P. I've had that problem before
How much clearance do you have from the top of the S/P to the frame?
I figure you got a little room because the S/P boot fits on
Cut down a socket (short) then grind 4 flat spots on the sides to get an adjustable wrench on it
That's what I did
Another suggestion
Heat and bend a box end wrench 90* or whatever angle works