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Old 01-21-2012, 10:43 PM   #46
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Join Date: Mar 2007
Location: the barnyard
Posts: 2,458
My Ride: '79 Massey Ferguson
Hard to describe the differences, they are subtle. Check the casting number on the head, underneath the intake manifold. I can't remember where the ones on the block are, but that will tell you.

An I head swap should be revving to the I redline at 6250 if I remember right? I would sort that car quickly. Sounds like a half-finished swap. Post pics, and look at the number on the DME in the top of the glovebox.
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