they are both inline 6-71's and they seem very clean and don't seem to be slobbering like a St. Bernard after a 10 mile run on a hot day .
they probably just need a good tune up which consists of adjustments of the valves , injectors and the rack . If you are not familiar with these engines get someone who is . you need special tools and the rack and governor are not to be messed with because a runaway is very possible .
