I do agree the chassis should be a good ground being you run your Neg off the battery to the chassis.I was having problems a few years back when I put my 1st all aluminum engine in my dragster and thought the chassis was good enough I even had my MSD ground bolted to it instead of the battery.But when I grounded each head to the same spot on the block as well as my MSD ground and run a ground cable to the Neg (which is ground to the chassis)like the MSD tech. said all my problems went away. I can grin about it now but when I was having problems,I did not think it was very funny and the tech. at MSD had a hard time making me believe it had to be that way.

PS I like to think that sometimes us Racers are just to smart for our own good....but I guess the Truth be told we are just to Hard-Headed to listen.