Quick question for u all smart people. How do I tell if this is a 348 or a 409. Been told to look at the dipstick location by others, but is there any other way. Been reading a lot about this truck online and in books. They where correct on some stuff and wrong on others. Like my rims are not 22.5" like it says in the specs, its 20". Is there like an owners shop manual for these big trucks??
