Jeep J10

[LRwrnglr]

I have a buddy that just inherited a J10 but he can't figure out what engine he has in it. He doesn't think its the 360 because theres too much room in the engine bay. Is there any way to find out what he has in it? Thanks

LR

 

[mud4feet]

Assuming it's a V-8......304 maybe????

 

[TerryMason]

Here's a J10 bay with a 401 engine:

 

[TerryMason]

another J10 with a 360

 

[TerryMason]

not sure how much thos photos will help, but I figured I'd try.

 

[LRwrnglr]

I haven't seen the truck yet so I don't even know what it looks like, haha. But he said he thinks its either a 304 or......he said that they made a 258 v8?? I haven't ever heard of it so I dont know. But thanks for the help

LR

 

[TerryMason]

258 4.2L straight six - the same that went into the CJs. Those are pretty common

Take a look at cayjay's site, there is some good info there

http://cayjay.jeepz.com/general/engine1.htm

 

[LRwrnglr]

Yeah I know that they made a 258 straight 6 that went into the CJ's but my buddy swayers that they made a 258 v8

LR

 

[mud4feet]

Came across this:

http://www.offroaders.com/tech/jeep/engine-factory-guide.htm

Might not help, but it's interesting.

 

[Bounty__Hunter]

Externally the 304 360 and 401 v8 looks pretty much the same. Pretty sure they had the displacement cast into the block or intake in large bold numbers.

 

[carriss]

I've seen more 360/auto's with quadratrac close to where I live than any other kind, I have yet to find another 258/4spd. I'am still amazed at the power this engine puts out.

 

[jps4jeep]

304 360 and 401 v8's all share the same accessory drive and I think externally the blocks are pretty much the same.

 

[LRwrnglr]

He also wants to know if there is anyplace he can find a vacuum diagram so he can get his quadratrac figured out. He does have the lockers but they don't work all the time and he wants to get it figured out so we can go wheelin.

LR

 

[hotrod jeep]

the harmonic balancer is different on the 304,360 401.look it up and that is the easy way to find out what you have .providing it,s original.

 

[jaber]

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He will find all of his answers at the above site. The 304, 360, and the 401 are all the same size motor with different bores. ALL the accessories and transmissions interchange.