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Will a 1968 Chevy small block work in a 1989 Chevy 1500?

Updated: 8/18/2019
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13y ago

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It will bolt right in, yes. However, you will have to defeat the OBD, which could get you into trouble with the "smog cops." And, I am not an automatic tranny expert, but, I think by defeating the OBD, you will have trouble with the trans, and lock up converter. Now, I know you can eliminate the lock up successfully, however, I think the trans is shifted electronically. A TH350 would work fine, though. I guess if you transfered the top end, heads, and up, from the 89 motor, to the 68 motor, you could eliminate all this trouble. The 68, is probably a 327, which would not run as well as a 350, especially in a truck. If you give a rebuilder both, your 89 motor, and the 68, the core values, if they are rebuildable, would be close to the price of a rebuilt 350, to put in your truck, which is what I would advise. The 68 motor has a value to the high performance guys. There werent too many 350's made in 68, and a 327, complete, rebuildable, is worth $500, or better, depending on which one it is, and what it is out of. And believe me, you would be happier with the right 350, in your truck, than with a 327.

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Q: Will a 1968 Chevy small block work in a 1989 Chevy 1500?
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