Thanks will probably get some junkyard springs and go that route, I'll post any gains from the diff oil swap , my truck is pretty consistent , to the point where i can pull up to the pump check my miles and get it to the tenth , how much a fill up will be, no gas gauge so always fill it and 25 k miles a year , almost 381 k miles on it now, and all original except fresh motor about 40 k ago, rebuilt original with stock bore valve guides and all within specs, synthetic oil and many changes at 3k of oil , look on you tube some pretty wild looking 300's on there .
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