The first thing to do is fix your transmission up. That depends on how 'fresh' it is, but figure on an upgraded valve body and a better torque converter. If you went the "full built" route it can cost close to $5k, a VB and converter is about $2.5k. Then you NEED a pyrometer, transmission temperature gauge, and maybe a boost gauge. Then you can move on to the engine. For mild power I would bump up the timing to about 16*, pull the fuel plate and regrind it to a #100 plate, and put it at about 3/4 forward (slotted screw holes), then tune the AFC. That would put you real close to 275 or so HP to the ground (that put mine at 299). Those mods were free since I die the work myself. I then purchased a set of 300 injectors (RV275 made slightly bigger) and that put my power at 365HP and 833LBFT of torque to the rear wheels. If I behave myself driving I have seen as high as 23.7 mpg for a whole tankful of fuel, but normally run 20 or so empty. Towing I get 14+ at 55-60 mph, 12 at 65 mph, and 10 at 70 mph. If you want more info I will be glad to show you where to get it.
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2005 Dodge Ram Four Door Dually Southern Comfort Conversion
2017 Forest River 365RK
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