273 engine swap into a Jeep CJ5
Put the Weber Progressive 2 barrel carb kit on your Jeep 2.5 carberated 4 cyl. That will give it some more fuel and wake it up.
Easy to do with these kits, lots lots easier than doing a V8 Swap Over.
Jeep 2.5, 4 cyl with the One Barrel Carb:
Progressive 2 Barrel Carb Kit for Jeep 2.5,
4 cyl.
Have used these Progressive Carbs many times with great success.
Running one on my performance built Dune Buggy, VW 1835cc 4 cyl Air Cooled engine with Progressive Carb. Always opening up the Secondary as a normal part of driving it.
Pulls Good, Runs Good . . .
Plow snow with it in the Winter time too.