


5 Days
245
24
$650.00
AMC 258/4.2L Engine, Build Date 1/11/79 Heavy Duty Version w/ 1/2" Head Bolts and 12-counterweight crankshaft. This a Rebuildable Core. For Jeep CJ-7, CJ-6, CJ-5, 87'-90' YJ Wrangler, and Scrambler/CJ-8. AS IS, CASH ONLY! Call or Text...
Note: The AMC 258 engine came with a 12-counterweight crankshaft until 1981, when it was changed to a 4-counterweight design. The change was part of a weight reduction program that also included an aluminum intake manifold and plastic rocker arm cover. The new design saved around 20 pounds (9.1 kg). The AMC 258 was a 258 cubic inch (4.2 L) straight-6 engine that was produced from 1971 to 1990. It was known for being reliable, inexpensive, and torquey.
KSL Classifieds makes it easy to buy and sell with peace of mind. Check our safety tips and quickly report anything that doesn’t look right to keep your experience smooth and secure.












5 Days
245
24
$650.00
KSL Classifieds makes it easy to buy and sell with peace of mind. Check our safety tips and quickly report anything that doesn’t look right to keep your experience smooth and secure.



AMC 258/4.2L Engine, Build Date 1/11/79 Heavy Duty Version w/ 1/2" Head Bolts and 12-counterweight crankshaft. This a Rebuildable Core. For Jeep CJ-7, CJ-6, CJ-5, 87'-90' YJ Wrangler, and Scrambler/CJ-8. AS IS, CASH ONLY! Call or Text...
Note: The AMC 258 engine came with a 12-counterweight crankshaft until 1981, when it was changed to a 4-counterweight design. The change was part of a weight reduction program that also included an aluminum intake manifold and plastic rocker arm cover. The new design saved around 20 pounds (9.1 kg). The AMC 258 was a 258 cubic inch (4.2 L) straight-6 engine that was produced from 1971 to 1990. It was known for being reliable, inexpensive, and torquey.











