Ford Y-Block Ready-To-Run Distributor Ready-To-Run With Rev Limiter. May Hit Firewall Seam On 57-59 Full Size Cars MSD IgnitionThe distributors also offer an easy to adjust mechanical advance assembly. Chromoly weights move smoothly on nylon pads and different advance springs and stop bushings are supplied so you can custom tailor a timing curve to match your engine's requirements. which is guided by a sealed ball bearing for accurate timing signals throughout the entire rpm range. The best thing about this distributor is that it features an ignition module that is built into