Depends on how extensive a rebuild is required - I did my AMC 360 last year and spent $1,900 on machine work and parts. I had it bored .030 over, new pistons, completely balanced, etc..
I would imagine you could do the 4cyl for around $1,200 in machine work and new parts - you will have to assemble it yourself of course...
I have a 87YJ auto. what motors will bolt up to it.I have been told that a ford 302,and a AMC 304 will.And that a older 258 out of a cj will have to change mounts.Any info will be helpful.
What motors will bolt to your factory automatic depends on what the factory motor is. If you had the 258 inline 6 cylinder AMC engine then you could bolt any of the Jeep straight sixes or any AMC V8 to the transmission as they all share the standard AMC bolt patter. No other engine uses this patter and as such no Ford 302 will bolt up to it. In many cases it is fairly simple to adapt a Jeep manual transmission to a Ford motor because Jeep and Ford often used the same transmissions. This is true in some of the late 70s and early to mid 80s CJs. All you would have to do is change the bell housing and make sure you had the proper clutch and pilot bushing and you would be good to go.
On the other hand if you have the 2.5 liter AMC 4 cylinder engine you would find that there are fewer engines to choose from. The AMC 4 cylinder engine doesn't use the standard AMC bellhousing, instead it uses the same bellhousing that you find on the 60 degree Chevy V-6s and such. While not all of these motors are V-6s the majority of the motors you will find with this pattern will be 6 cylinders, the one exception I can think of off the top of my head would be the Cadillac Northstar V-8s. GM had several different V-6s that use this pattern in both front and rear wheel drive applications. A good example would be the relatively unreliable 2.8 liter V-6.
It came with a 7 year warranty. So far, I'm very happy with their work!! Highly recommended.
2.5 Skyjacker Lift, chrome grill, steel step bumperettes, new bestop trailmax front seats, K&N, Por15'd frame, Por15'd cab with por15 topcoat....whatever is nasty is being removed and restored!
I had my machine work done and parts for $800. That includes a reground crank, bored over .030, new pistons, head work done etc. I did have to put the head on the block, install the accessories, and put the engine in the truck. This was a 258 6 banger out of a Scout BTW.