Kohler Type 22FC-7 Cast Iron Coal Burner

Water-Lou Mancusi

I've just been asked to quote a job to replace the above mentioned boiler. I ask if someone could explain the boiler plate information to me so I could calculate the size boiler I should quote. This is a retrofitted oil fired, hydronic, monoflo convector loop system with a 9" chimney flue. There are cast iron convectors, which I've never seen this style before, and four column cast iron radiators and baseboard.
The plate reads as follows:
Kohler Type 22FC-7
Valve Capacity 178lb/hr
Gal Oil 1.75
Steam 490
Oil Fired Baffled
175* Water 785
Are these numbers sq. ft. of steam? What is 785 of hot water? The house is 1300 sq. ft.
HELP!