Tom
I have the 45 hp, and with pilot wt, coats, radio ETC my takeoff weight was 255, field elevation 6,200 feet, density altitude over 8,000 and i climbed to over 11,000 feet. I would think with a weight of 160 and 37 hp it should work, with the right prop. If deciding on engine i would recommend the 45. My take off roll at 6,200 was about 800 feet whereas at 250 feet altitude, where i normally fly is about 150 feet.