What engines can I swap out a 69’ Pontiac lemans with ? Preferably something Ls

Asked by Tyree98w May 24, 2020 at 12:57 AM about the 1969 Pontiac Le Mans

Question type: Car Customization

What engines are compatible with a Pontiac 69’
lemans that  I can swap out with? Or what engines
can I put in a 69’ Le Mans from Chevy

6 Answers
26,865

taver91 answered 4 years ago

The Lemans used the same basic size engines as the Malibu so the base V8 was a version of the Chevy 350 block. The body will also accept a similar version of the 400CID used in the GTO's.

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F_O_R answered 4 years ago

I would keep the car original and rebuild the engine or at least use a correct Pontiac engine instead of a Chevy engine.

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26,865

taver91 answered 4 years ago

My mistake - old brain but I believed the chevy block was the same as the other GM engines of the period. Sorry and hope you find a suitable replacement.

1 people found this helpful.
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Guru3319T answered 4 years ago

Old Pontiac blocks are visually the same. Technically they never had a big block like Chevrolet instead the larger 428 and 455 used a larger crank journal 3 to 3½ but blocks exactly the same making swapping easy. If you want more hp for your buck crate motor is the way to go.

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