yes i have that tattoo on me.. they did a test for circle track mag about 10 years back at the end of all the testing not much was found out. they said that they talk to reher and said the rod is used to hook up the piston to the rod .... i have run the 6.375 rod with a 4.375 crank they work i have a friend that runs a 5.000 crank with a 6.635 rod in the 10.200 block OK he scares the hell out of me