83Cj-7 budget bog project

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gmsforlife

Not-quite-so-new-guy
Apr 25, 2012
15
0
0
michigan
My moms 83 cj7 im fixing up to be our bogger she bought it 3 years ago. She broke the driveshaft, its been sitting since so i towed it to my highschool and am fixing it up. it has the 4.2 in it and has a soft and hard top



to do list
-battery (done)
-starter (done)
-fuel pump + filter (done)
-oil change (done)
-fix radiator and check for other leaks (in progress)
-driveshaft (in progress)
-transfercase rebuild or change out
-brakes
-find other misc problems and fix them
 

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beermonkey9417

Royal Smart Person
Apr 8, 2007
2,443
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des plaines, il
trans cooler w/fan 8)
 

Oldsmoletick

Royal Smart Person
Sep 18, 2009
1,581
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cny
Nice! Is that a steel valve cover I see? May have had an engine swap at some point? Lots of little tricks out there to make those 4.2's wake up a little more :mrgreen: .
 

dream on mcss

G-Body Guru
Jun 22, 2011
617
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Oxford, MI
i can definitely vouch for that 258 sounding badass lol. i was right there when it first started haha that things a beast!
 

gmsforlife

Not-quite-so-new-guy
Apr 25, 2012
15
0
0
michigan
Oldsmoletick said:
Nice! Is that a steel valve cover I see? May have had an engine swap at some point? Lots of little tricks out there to make those 4.2's wake up a little more :mrgreen: .


no i do not have a swap in mind but want to lift at some point but idk i like lots of power
 

Oldsmoletick

Royal Smart Person
Sep 18, 2009
1,581
10
38
cny
May have worded that funny, lol, meant it already has been swapped, for an older engine (and or head). Not a bad thing though, the plastic covers suck.
 

gmsforlife

Not-quite-so-new-guy
Apr 25, 2012
15
0
0
michigan
Oldsmoletick said:
May have worded that funny, lol, meant it already has been swapped, for an older engine (and or head). Not a bad thing though, the plastic covers suck.

haha yea i just read it wrong im a bad reader hahaha and yea not a fan of plastic covers
 

kornball426

Royal Smart Person
May 29, 2009
1,439
286
83
Philadelphia, PA.
I read in a tech article once that the later 4.0 head practically swaps directly onto the 4.2 block I think the only thing that needed to be changed to make it work was the pushrods. Gives a bit more compression and better breathing I think they said it's worth 25 horsepower with no other mods.

I could be wrong on that though... But it's worth looking into if you want a bit more power without doing an engine swap.
 
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