I have recently gort my 91 trooper has the 2.8lwith auto tranny it is getting up there in miles at almost 270000 miles. So i am thinking probably goodtime to start looking into a new motor. Was wondering if anyone knew what motors were compatible for the easiest swap i have heard S10 2.8 and 4.3 are. And how hard is it to put a manual tranny in if i were top get a new motor. Thank you for any info or the push in the right direction