If I remember correctly, that model had the Tecumseh engine, for whatever that is worth. Sorry, can't help you with an alternative engine choice.
JD 4066R CAB
JD H180 FEL with SSQA brackets, JD iMatch, JD Ballast Box & ext, JD pull behind seed spreader
Frontier RB2196H 8 ft rear blade/hyd angle, Frontier BB1065 Box Blade, Befco 3pt 110 inch RFM
48" pallet forks, KK 3pt Boom Pole, Northern Tool 3pt middle buster, 2 bottom Dearborn plow
County Line post hole digger, Rhino 3pt 10ft brush hog, Land Pride 8ft rock rake
Fit Rite Hydraulics 3pt Top Link, front 3pt adapter for SSQA, 7 1/2 ft Field Roller, 8ft Dearborn tandem disk