Hello folks! I just bought a pretty well built 1978 CJ7 and I have a couple of questions. I am new to Jeeps but have been Four Wheeling for years with Early Broncos. They just soak up too much cash and gas anymore. The Jeep I bought has a 304 in it with a 2 bbl carb. I am considering a swap to a 4 bbl or TBI. If I go the carb route would a Edelbrock Performer manifold and a Holley 470 CFM Truck Avenger be a decent set-up or would I need the cam and lifters as well? If I go with TBI would it perform better with a 4 bbl manifold? The Jeep has stock flares on it and 10.5 wheels with 33 BFG Muds on them. Would Bushwacker Pocket Flares have too much overhang and look like crap? <img src="/forums/images/graemlins/scared.gif" alt="" />

So out of curiosity, what is wrong with the 2 bbl carb? You say you left the Bronco and went to a CJ7 because it cost to much on fuel, and now you want to put on a 4 bbl carb which will likely get worse mileage than the 2 bbl you currently have.

Guyver... Sounds like a nice rig. As for intakes, the twice barrel will give you all the fuel air mixture that ride can handle. Putting a 4 barrel and different intake on there will give you a few more rpm above five grand...but how often are you planning on running her up there?
If you just MUST make an intake change do it with a throttle body.. It is a far better swap than a 4 barrel.
If it runs nicely, which I think you have indicated, just keep it stock.
Now if you intend to pull the 304 and do some head work and install a real good camshaft with little overlap and high lift, headers and dual exhausts, by all means put the big intake and a nice 400 or LESS cfm carb on there.. BUT just adding the carb will only make some noise as it trys to burn more fuel.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

<img src="/forums/images/graemlins/lol.gif" alt="" /> <img src="/forums/images/graemlins/lol.gif" alt="" />

It'll soak up some dosh, don't you worry. As for the flares - I run 12.5 tires and had to get flares that covered them to pass inspection. I got 7" wide ones IIRC (They were the widest I could find) and they just cover the tire. I think they give it a better look - more square/ less tippy. Not familiar with the BW's but if they're not more than about 5-6" I think you'll be pleased. And there will be a bit less muck smacking you in the back of the head and inside of the windshield when you go in the mud hole. <img src="/forums/images/graemlins/smile.gif" alt="" />

I just wanted to squeeze some more power out of the Jeep. I figure even at the worst it can't beat the 6 to 8 mpg I was getting with my built EB with a 351.

This is what I needed to hear,some good tech advice. I just wanted some more juice out of her. At some point in the future I will drop in a Chevy with fuel injection for that I guess. Right now I will just enjoy the ride! What is needed for the 350 swap? I am counting on at least a tranny adapter for the TH400 and motor mounts. Anything else outside of all the 350 stuff? <img src="/forums/images/graemlins/mrt.gif" alt="" />

You will need axles and a transfer case to go with that 350.
Big JIm <img src="/forums/images/graemlins/pfft.gif" alt="" />

Not with 44's and a 300...just a tranny to t-case adapter, and motor mounts, like he said. Check his sig. <img src="/forums/images/graemlins/kewl.gif" alt="" />

Welcome to the Wire. <img src="/forums/images/graemlins/cheers.gif" alt="" />

If and when I get around to a 350 swap I think the drivetrain is ready for it. It would be a stock 350, nothing axle breaking. <img src="/forums/images/graemlins/kewl.gif" alt="" />

If you have a Motorcraft 2100 2V carb, which was stock on most of the 304's, it is a very good carb. Aside from possibly needing a rebuild, there's really no reason to change it.

A (GM, or other) HEI distributor & larger wires will allow more spark plug gap (.045) and more advanced timing. This is a popular upgrade.

Here's a good writeup on a 350 swap...

http://www.manoian.net/jeep/jeep_chevy_350_conversion.html