Hey Sandblaster, there's a much easier way to mould your tank. Boil it in water. I used the wifes' big kitchen pot on the stove. (When she was out!)
Kepp heating and moulding. The plastic will be very soft when it's hot, and doesn't take long to warm up. When you've got it how you want it, dunk it in a bucket of cold water and it will stay in shape. No need for a shorty spark plug!
Also, I cleaned the petcock casting up which gave me more clearance on the head.
