Has anyone installed an MSD 6AL ignition box on their ranger (4.0)? Installed the Jacobs equivalent on my 70 mustang and picked up about 1-2 mpg and 2 10th in the quarter mile. Thinking of doing the same install on the Ranger to see what kind of mpg improvement shows up. Great to read feedback from someone who has done this install. Also, MSD sells a coil pack module for the 4.0 ($58) and am interested to learn if anyone has done that install and if so, what impact if any it had. THANKS!