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Old 12-06-2017, 02:22 PM
Maliciousupload's Avatar
Maliciousupload Maliciousupload is offline
Join Date: Oct 25, 2017
Location: BC
Posts: 1
Talking What's up people! 1980 J20 Jeep

So I have a 1980 J20 Jeep with a AMC 360 currently on propane that I am going to be converting back to gas and am looking forward to letting you guys know how my restoration goes with my true love. I am currently living in an apartment so repairs are difficult, i deal with a lot of obstacles and planning needed to accomplish a goal considering my work space and no prior mechanical training but someone has to do it right!
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Old 12-06-2017, 03:03 PM
joe joe is offline
Join Date: Apr 28, 2000
Location: PNWet, USA
Posts: 22,392
Don't have a clue about going back to gasoline from a previous LPG conversion. A local RV shop can prolly guide you toward an info source. So far a being new to wrenching I highly recommend you spring for an original 1980 TSM (factory Tech Service Manual) or a repop. Don't bother with a generic Haynes manual. They try to cover too many years to be of value for 80 specific specs. On he apartment dwelling thing I would source a friend or relative with a house/driveway and work a deal.
"Don't mind me. I'm just here for the alibi"
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Old 12-07-2017, 05:42 PM
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backroadin' backroadin' is offline
350 Buick
Join Date: Aug 11, 2004
Location: Vermont
Posts: 917
Welcome! No better way to gain mechanical skills than to work on a Jeep.... you know, 'cause they never stop needing something!
That's how I learned!
"Roads? Where we're going we don't need roads." -- Dr Emmett Brown

73 Wagoneer - 4.6L Stroker (yeah baby!!) t176/d300, 3.73's, 33" muds, 4"spring lift, 2" body. Offy dualport w/ Quadrajet, pertronix, flowmaster.
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Old 12-08-2017, 09:37 PM
BA_051 BA_051 is offline
232 I6
Join Date: May 06, 2008
Location: Everett, Washington
Posts: 189
Welcome to the forums! I concur to getting a factory TSM for your year, it will help a lot.

I have done a few conversions to and from propane, granted none of them were on jeeps, but all carb engines are very similar. Most were strait forward from LPG back to gas... Just remove the propane tank (after its emptied of course) and the lines/fittings/ect. The motor side was just as simple as replacing the LPG carb with a gas carb, installing either the mechanical fuel pump on the block or an electric pump, installing a factory tank with sender/pickup in the stock location and running 2 fuel lines and 1 wire for the sender. That was on '77 ford f100... A bit more complicated going from gas to LPG...

An ECM controlled motor, well thats a different story... quite complicated...
1974 Jeep J20, gladiator grill, 12v p7100 cummins, Modified He351, 4" strait piped, NV4500/Ford NP205, 14b front kingpins, 14b rear, 4.56's, 12" lift, 37x12.50x16.5's
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