You do tow. On the 40HP Bosch injectors see if you can find the hole # and size of the holes.
If those are 190 bosch injectors they make a decent towing injector.
You can tow with a set of POD's. But they haze at idle.
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93 W350 w/duals, fuel pin turned, 6X.018" injectors, 4" exhaust, 3" air intake horn, Super HX40/16, auto, 3:07's axles, 2" skyjacker lift, B&W flatbed