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Yep, tell em you got a 77 CJ5 with a 304. If you want any more power you can always bolt in a 360 or 401 too, the exterior dimensions are the same, just change the flywheel, shared a lot of internal parts too.

In those years horsepower was varied by the amount of smog gear that was attached to the motor, and what the manufacturers published for the insurance companies to believe, I would not go by those ratings. Go by the seat of your pants, is it enough to move the jeep around and do what you want?

The reason I think it is the mainshaft bearings is that you can only hear it with the clutch pushed in and coasting, when the clutch is tight it holds the shaft/disc from moving laterally and does not allow them to rattle, but when you press in the clutch the disc is released and allowed to move...

Right you are, I must have missed that 5 part:redface:

Sounds like maybe the bearings in the mainshaft are going bad, or the pilot bushing is worn out, which probably means that the mainshaft bearings are going bad too. Either way it sounds like a transmission pull is in order to check for bad parts.

I don't think the engines had a date stamp on them, if it has the 304 on the side of the block they were all the same internally. Front axle should be a Dana 30, rear should be an AMC Model 20, here is a good axle guide by the cover style http://coloradok5.com/axleguide.shtml The trans should be...

Does the jeep have a transfer case drop? If so, the shifter may be hitting the tub and not engaging properly when you pull it all the way back, pull up the 4wd shifter boot and look at the clearance between the lever and the floor board, you might have to notch the floor board a little to clear...

Link to stock Jeep axle width's, looks like Bounty is closest. http://www.jpmagazine.com/techarticles/62558_junkyard_axle_swaps/index2.html

I have a pair of Dana 44's built for a narrow track 70's CJ5, Detriot lockers, 4.56:1 gears, disc brakes front and rear, Warn premium lockouts, Moser axles, heavy duty tie rod with heim joints. Front, wms to wms 53" Rear, wms to wms 51 1/2" Both, spring perch center to center 27 1/2" Very...