The motor is based on the West Bend 35.1958. Model number 571.XXXXX.Only available in 58.
sears motors changed to McCulloch in1959.
35.9 cu in. J4J champion plugs set at .030.Points set at .020
Tillotson OM carb.1/3 pt of TCW3 rated oil.
West Bend became Chrysler in 1966.
Power head was still 349.56 cu in. at least through to 1970.
An interesting project but parts may be a challenge. you may find some help at
www.aomci.org