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Unread 01-01-2012, 05:59 PM   #1
Registered User
1983 CJ7 
Join Date: Sep 2006
Location: Michigan
Posts: 72
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?


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Unread 01-01-2012, 06:06 PM   #2
Web Wheeler
lucdog's Avatar
1980 CJ5 
Join Date: Jul 2006
Location: , Il.
Posts: 7,968
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, needs work.
1973 J 4000,
1978 CJ7 DD.
1979 CJ7 360, TH400/Quadratrac trail Jeep.
1979 J20
1980 CJ5 trail Jeep.
1983 CJ7 pretty weekend and sometimes to work Driver in the summer, My first rebuild, if the Q-trac and 5 are broke, this one is the one to take. its just as capable as the other 2, except nice paint.
1984 Grand Wagoneer, 1 ton axles, great 360/727, and a big a$& tree fell on it .
1989 YJ the CJ to YJ conversion.
2005 TJ Rubicon.
2011 Grand Cherokee Laredo 4x4, Mrs. LUCDOG's DD.
Lots of parts not for sale, i'm a hoarder.
lucdog is online now   Reply With Quote

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