Furnace Ideas / Help

Man I see nothing in that info that shows what you need. I DOUBT you need or want more blower. Do you have any / minimal ductwork? Normally in a "shop" situation, with no ductwork, you want the blower on slow for two reasons. One, the temp rise is usually not enough, outlet too cool) and two, the minimal ductwork causes the blower to overcurrent. In the old days low speed was the blower red wire.

See if you can find a maintenance manual/ wiring diagram. May be one on the door of the furnace. Temp rise should be stated on the furnace ID plate.