258 swap to 304 - JeepForum.com
Sign Up   Today's Posts
User: Pass: Remember?
Advertise Here
Jeep Home Jeep Forum Jeep Classifieds Jeep Registry JeepSpace Jeep Reviews Jeep Gallery Jeep Clubs Jeep Groups Jeep Videos Jeep Events Jeep Articles
Go Back JeepForum.com > Models > Jeep CJ Forum > 258 swap to 304

Yeti Paracord Handles are in at JeepHut.comFS: Jeep Fog Light LED Bulbs! Several Brightness Options! 6th annual beat your wife to the credit cards sale!!

Unread 01-01-2012, 06:59 PM   #1
Registered User
1983 CJ7 
Join Date: Sep 2006
Location: Michigan
Posts: 75
258 swap to 304

I bought a 304 engine. I am bringing it to a local engine shop for rebuild. I just want about 250 horsepower out of this. Can you help we with what I should be asking for, buying, etc..

I am a novice but here is what i know (or think I know).

83 cj7
auto transmission
258 in it now.
I am not sh*tcanning the 304 and going with a 360.
I see this going something like this:

1. Engine rebuild.
2. I buy water pump, 4-core radiator, alternator, electric fan, intake manifold, carbuerator, HEI (what else am i missing?).
3. Get transmission rebuilt.
4. Put engine in with new mounts.

Can you guys help we with advice?


CadCaman is offline   Reply With Quote Quick reply to this message
Unread 01-01-2012, 07:06 PM   #2
Web Wheeler
lucdog's Avatar
1980 CJ5 
Join Date: Jul 2006
Location: , Il.
Posts: 8,603
You will also need the passenger side motor mount bracket, that bolts to the frame,
The proper flex plate for your 304/transmission.

I cool a stock 360 and 304 with a 3 core radiator.
1957 WILLYS pickup,
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7
1989 YJ the CJ to YJ.
lucdog is offline   Reply With Quote Quick reply to this message

304 , cj7 , swap

Quick Reply

Register Now

In order to be able to post messages on the JeepForum.com forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid e-mail address for yourself.

Email Address:


Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.

Thread Tools

Suggested Threads

Jeep, Wrangler, Cherokee, Grand Cherokee, and other models are copyrighted and trademarked to Jeep/Chrysler Corporation. JeepForum.com is not in any way associated with Jeep or the Chrysler Corp.