It will fit and works fine. Factory 340 intake does have bigger ports, but works well and will wake up the little motor; just dont want to go big of the carb, no bigger than 600 cfm, 500 would be wore reponsive. Btw, that tor-red road dunner in the box above is a twin to mine. Have fun!

The correct answer is yes if its a 1966 or later 273.The earlier 273 had a slightly different bolt angle.I've seen a lot of people waller out the holes to make the bolts go in but the bolt head still wont tighten down flat.