hey i have an 86 s-10 blazer with a 2.8 ltr engine 2wd. do ya know what all i have to change to go from this 2.8 to a 4.3 i know i have to change the ecm the motor of course and the tranny. but what else. does the 4.3 ltr ecm have the same harness entrance as the 2.8ltr.

 

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