I am going to upgrade my 2 piece rear main seal 5.7 to a newer 1 piece.

dan2744

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I have the Gen 1 outdrive, will it mount to the newer coupler? I am already going to have to get a new flywheel starter and coupler, id like to keep the outdrive, is it possible, it sure looks the same?
 

alldodge

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Repowering with a newer block should not be an issue. What year is the original motor?
 

dan2744

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1985, this one is a 90 s block with 1 PC seal. What flywheel do I need?
 

alldodge

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Assuming pre-vortec
If your old motor has a 12 3/5 flywheel, you will need to get a 14 inch flywheel and bell housing. Need the triangle coupler and offset starter
 

dan2744

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That's what I was thinking just wasn't sure about flywheel, thanks. It is pre vortec.
 

dan2744

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It looks the same, I know I need it for the mounts but I haven't pulled the motor yet
 

alldodge

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It does list the same part number clear through from what I found
 
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