Not sure about your 91, but my 88 has the 2 little screws. But you don't unscrew those to replace the blades. Just remove the blade itself. On mine, it uses a single pin that goes through the center of the blade.


88 4R, 350 V8, R150 5 speed Sold <...uot; />
97 4R, stock, daily driver
98 Sienna, kid and dog hauler, wife's ride