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Help.. I have a 73 620 and a engine from 86 720..?!


Dizer73-620

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No. Although the L series and the Z series motors have the same bolt pattern spacing they are oriented differently to bolt to their respective transmissions. You can bolt the Z24 to an earlier L series transmission but it won't fit in the truck and work reliably or properly..

 

Depending on what 5 speed conversion you have, you could swap a Z24 and it's 5 speed into the 620.

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