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Debbie Harris's 1969 Grand Prix

2022 September
of the Month

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51 straight 8 swap in a 33 straight 8

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The engine in my 33 is shot, not rebuildable.  The 33 has the enclosed driveshaft.  I have access to a 51 straight 8 that is a great runner with high compression.  It has the 4 speed hydramatic with it.  My wife wants to drive the car when it's finished so I would like to utilize the auto trans.  Anyone know if it's possible to adapt the enclosed driveshaft to the hydramatic?    


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Looks like you might have to go with the entire 51 drivetrain?  Including rear end.  I've never worked on cars that old.  If your making a swap,  you might consider using an Iron Duke 4 cyl with a turbo 350 behind it.  With the correct exhaust (might be alot of trial N error)  You can make those engines putt putt putt like an old engine.  Better gas milage and easier to find parts when needed.  Justa sayin.....

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I want to keep the engine as it was, a straight 8. thanks.


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Casper - photos would help. Can you share some photos of what the current enclosed driveshaft situation looks like please?

The '51 sounds really good BTW.

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