Rusty
I am going to Cuba 23rd August 2012 to see my friend, I believe the pistons are worn along with piston rings. I will speak to him take quotes, pictures, specs for all the parts along with costs and ask him exact problem and come back to you if I may. I can then order exact parts when I return to Cuba at Christmas 2012.
Your help and advice is much appreciated, I may e-mail you from Cuba when I am there if I get any more difficult questions or problems.
Regards
Eddie