i have aquired a late 60's to early 70's 72" outfront jacobsen mower. it has a opposed twin 23hp 58 cubic inch kohler, which is the second one on the machine but its not going to last too long. a shortblock for this engine is over $2000 so im looking for newer alternatives. im thinking either a 33 or 35hp vanguard or a 27hp kohler command or a 28hp kohler command pro. i need the engine to be rebuildable atleast once. i need the most replaced parts to be cheap, unlike now that an ignition coil costs $125 the engine will run synthetic oil and a bypass filter. what are your thoughts?