135 D reg new engine swap

Nice little tractor very little use since new engine went inn 3 years ago origenal as bought D reg very few out there it does not suit my needs so 11000 euro or will swap for a decent four wheel drive tractor that has good power in back end straight deal or money one off 135 the engine cost was 4500 gills inn road offaly done the engine if u need to cheack that out thanks