273 engine swap into a Jeep CJ5
The
318 (5.2 liters) was brought out in 1967; the main difference from the
273 was its larger 3.91” bore. The
318 was never used as a performance engine by Chrysler; the
273 four-barrel matched it in peak horsepower, and the more performance-oriented 340 was quickly released in 1968.
With the above info in mind, I would contact these guys:
Dodge Small Block V8 Universal MMX Series Engine Mounts for Jeeps and Other Vehicles
Oh, and :welcome: