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well my bother blow the motor in his 91 s-10 with a 2.8L. i found a guy that has a 1987 s-10 with a 2.8L motor. is anything different on the 87 to 91 that may not make the motor swap work? anything that may be better on the 91 motor that i should use on the 87 motor such has heads, intake?
 

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4x4 v6 blazer
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Short blocks are exact same. Only difference I can think of that might come into play is GM redesigned some of the plugs on sensors so you might have to change them out. Other than that its the same motor.
 
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