Just don't understand why
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Just don't understand why
I have a 4.3 motor that came out of a 1997Chevy Astro with the master rebuild kit part number EK3129M and I also have a 4.3 motor out of a 1999 Chevy Blazer with kit number EK3129AM. Could anyone tell me the difference between the two and why one can't be used on the other?
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