An engine swap is the bedrock of hotrodding. It’s been that way ever since someone first dropped a Flathead Ford V8 onto a spindly Model T frame. That paved the way for folks to stuff all manner of massive powerplants into absurdly small engine bays.

…The results, of course, are all sorts of awesome.

So we came up with a list of our Top 10 Favorite Engine Swaps. Take a look at the list, click the headlines for more details, and let us know what you think in the comments section below.

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10. 1977 Chevy K5 Blazer-E

The future of engine swaps? This Blazer is a test mule for GM’s eCrate electric drivetrain conversion packages. (Image/Chevrolet)

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9. 1973 AMC Javelin with 5.7L Gen. III Hemi

Stuffing a Chrysler Hemi into an AMC required some clever engineering, but the results are spectacular. (Image/OnAllCylinders)

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8. Jay Leno’s 1968 Ford Bronco with 5.2L Supercharged V8

Unveiled at the 2019 SEMA show, this Bronco’s packing a 760 HP V8 poached from a Shelby GT-500. (Image/OnAllCylinders)

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7. Lotus Europa with a LS6

rear quarter shot of the engine bay of a lotus europa with an LS6 v8 swap
How about, instead of “adding lightness,” you add a 385+ HP LS6 engine to a featherweight British touring car? (Image/OnAllCylinders)

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6. Datsun 510 with L-Series 2.0L

Datsun 510 front
A 2.0L in a Datsun “Five-Dime” is basically like stuffing a BBC into a Chevy II. (Image/OnAllCylinders)

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5. Monte Makeover: 1986 Chevy Monte Carlo SS LQ4

Not only did this Monte get an LQ4 LS, it received a manual transmission and a ton of other upgrades to turn it into an autocross course monster. (Image/Travis Jones)

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4. Hemi J! 1951 Kaiser Henry J with a 5.7L Gen. III Hemi

1951 Kaiser Henry J with a 5.7L Gen 3 Hemi Swap
The most amazing part of this build is how it maintains a vintage look—no hood bulge or fender flares required. (Image/OnAllCylinders)

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3. Ford Model A with Cummins B-Series

Cummins-Diesel-Hot-Rod-Engine-Front-driver-side
This hot rod is sporting a Cummins B-Series diesel. We’re a fan of the custom frame work too. Also, Duallies! (Image/OnAllCylinders)

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2. Project X 1957 Chevy 210 with a 632ci Big Block

front view of project X 1957 Chevy 210 with ZZ632 Big Block
From electric power to a 632 big block, Project X is our favorite—perpetual—swap project. (Image/OnAllCylinders)

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10. 1936 Ford/1947 Citroen with V16 Detroit Diesel

Frans' V16 Hot Rod
Ahhh…Uhhh….diesel…hot….rod…err…twin…turbo…JUST LOOK AT IT!!!!11!!one!! (Image/OnAllCylinders)

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Author: Paul Sakalas

Paul is the editor of OnAllCylinders. When he's not writing, you'll probably find him fixing oil leaks in a Jeep CJ-5 or roof leaks in an old Corvette ragtop. Thanks to a penchant for vintage Honda motorcycles, he spends the rest of his time fiddling with carburetors and cleaning chain lube off his left pant leg.