My mechanic found identical KB pistons thru one of his vendors. He will start boring once he gets the pistons so he can verify exact size of each. Techinspector1 gave me the blueprint for this build and told me that I would be able to use my stock torque converter however I was thinking that since I've gone this far I was wondering what would be a good choice if I was to go ahead and replace mine. Keep in mind I can't break the bank on this last part.