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Winnebago brave 2 bbl card5/20/2023 Swapping to and electrirc fan would be a plus too. Personally, I'd go with the dual exhaust and, if affordable. Or, you can add your story to the ones already out there about how the headers melted the fuel and brake lines and started a fire. and you WILL have to install heat shielding. you're going to need to re-route wiring, maybe the fuel lines. You can put in headers if you absolutely feel that you must but, the gain is nearly nothing, especially compared to the cost and the complications. Install an upgrade HEI ignition and Tweak your timing? Start with an Edelbrock, economizer 650cfm, 4 bbl carb? or Install a TBI? Upgrade parts are plentiful and there's no shortage of them at the street rod/hot rod shows so I would reasonably assume they must be able to be tweaked. You didn't mention if the 318 has the stock, 2bbl carb? The only way to get more power is to install a bigger motor? The 318 is a widely used motor that's been around like. Add a dual exhaust system (which you can make yourself with off-the-shelf parts), and you'll have a good balance between power and economy without having to sell your body parts to pay for. Replacing the carb with an Edelbrock is really simple. much less to pay a mechanic to do the work. And, most people don't have a lot of money to dump into parts. Most people want to be able to not have to crawl up hills but not have to own a bank to pay for the gas either. What you choose to do is really based on what you want for the end result. It's expensive, many people reported problems with it, most didn't notice any or minimal improvements. Oh yes, some people tried the MSD full ingintion system upgrade (on their 318s). But, I could blow up any mountain at whatever speed I felt like. I got 8 mpg, which is about tops for a 440. The rig would drop to no more than 40 mph. However, it fared ok on the road, except for steeper hills. This was on a 440 which is really too small. When I bought my last Winnie, it had a 600 cfm Edelbrock Economizer on it. The most sensible thing to go with is simply an Economizer. WARNING: There is a price for that kind of power which is paid for at the gas pump! the Thunder series (previously the Performer series) is the choice. Over the years, I've read that the Edelbrocks seem to be the easiest to work with and are good quality. You can go to JEGS or Summit Racing websites and see what they have. You shouldn't have to change the intake but. I've see 440's for the price of a good four barrel and intake manifold for the 318. My observations and experience tells me 440's are available for a few hundred to several hundreds of dollars. If the 318 is soft then just swap it out. But as most know you can spend a fortune chasing power on a little 318 and when your all done you could have bought a decent used low mileage 440 out of one of these rigs for half if not the same money you would spend trying to get more power out of the 318 and you'll get around the same mileage 8 to 10 with the 440. It's a great little engine and will get you from one end of the States to the other trouble free and at about 8 to 10 miles to the gallon. If you have a good running 318 my suggestion is don't mess with it. Hm? Shoot I don't quit know how to explain this as I started out with a 21ft 318 which I loved and thought was the cats bum.
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