How much is the going rate for surplus 2B or 3B engines with transmission (preferably 4-speed) nowadays? This is for the LC40 Landcruisers, pampalit lang from gas to diesel.

Are these engines/tranny combination bolt-on on the LC40, or would there be much modification?

Lastly, is engine and transmission always a set when you buy? Sorry, totally newbie po kasi. Thanks!