Everyday; all the time - life in the fast lane.
It's not as hard as most people think - just buy the Haynes manual and read. Read. Spend a few weeks (no, I'm not being sarcastic) understanding how it works, what it does, what it needs, what breaks, and how to diagnose & fix it, and you'll <font color=blue>NEVER</font color=blue>
go back to carbs. I'm sure Jeeps are a little different, but all I have to do to find out what's wrong with mine is put in a short jumper wire before turning the key on, and then count flashes of the Engine light. There are around 400 codes that it can flash out, which may sound bad, but it's actually a good thing: think of how specific it can be about the problem with 400 "words" to describe it.
I used to have the same trepidation dirtrod describes, but after throwing away an engine I had rebuilt 30Kmi before because of a flaw in a minor carb component (yes, the carb was rebuilt at the same time), I decided to switch. I'll never F#(& with another carb! It's SSSSSSSSSOOOOOOOOOO much easier, more reliable, cheaper to fix, more versatile, and more driveable.
My total cost, including new plugs, oil, coolant, filter, used gas tank, alt, PS pump, A/C compressor, air pump, fuel lines, Y-pipe, flywheel & clutch, air filter, engine harness, engine compartment harness, & an engine that (to this day) has never been opened (oil pan, valve cover, etc.) was $1300. It took me about 2 weeks to find an engine less than 5 years old with less than 80Kmi on it at MY price, and 1 day to pull it & all the other stuff of a few trucks at the junkyard, and I'd recommend it to anyone over rebuilding or installing a carbed engine.
I agree with almost everything LEVE says, except
<blockquote><font size=1>In reply to:</font><hr>
doesn't break often. It requires little maintance other than cleaning.
Mine was out of tune 30 miles after I tuned it, and ALWAYS needed something replace, fixed, or adjusted. A total PITA! The only time I spend under the hood now is when I feel like tweaking or adding something. The only problems I've had were a) forgetting to change the plugs for 80Kmi - they had burned to 0.14" gap before the computer couldn't handle it any more; & b) the coil burned out last weekend - $24.
Can you tell I like EFI yet? [img]/wwwthreads_images/icons/wink.gif[/img] You can see a pic of the swap in <A HREF="http://www.webphotos.com/default.asp?album_id=217
" target="_new">this album</A>.
Steve 83 Bronco 4.9L
<font color=red>Build it; Don't buy it...</font color=red>