i have a c221 engine installed on my wrangler, but i want to change it to a newer engine coz its too old, just want to put it on a retire..4ja1 engine is my first choice but its too expensive..50k according to the mechanic.. too expensive..have any engine suggestion? (torque,fuel economy,fair price) my family is in sugarcane business and thats where im going to use it..

Best place to buy?
Engine price/estimate?
Transmission price/estimate?

Thank you Sir in advance!!