Note to other owners- there are FOUR different types of Ford-issued timing pointers- one of which used a ring mount for an electronic timing sensor (on points ignitions!) used by Ford dealer$ during the smog era. Deleting the idler pulley and running a slightly shorter vee belt cleans up the timing area's visibility. You adjust A/C belt tension by moving the whole compressor on its slotted bracket holes. Much easier with a half-weight rotary compressor.