I'm assuming you didn't have a booster before,....just a manual master, with just one rod from the pedal to the master, the booster requires an intermediate linkage that bolts thru under the dash, in the brake pedal support frame, you'll need the short pedal rod as well, the whole thing when together looks like a "Z" shaped linkage assy, because the booster sits up higher, usually trying to find the right bellcrank assys can be fustrating, as different size links are used, different diameter holes/bores in the link ends,....try to source the entire linkage needed, 70-2 E is pretty much the same, except for Bendix dual diaphram cars,...I assume you have the single Chrysler "flat pancake" booster?,....73-4 E are usable but the brake pedal end thread is larger, IIRC,.....71-2 B body will also work


Mike