Bringing an old thread back to life in case anyone gets this info in a search as I did. Had the common #3 rod make a nice window in the block in an srt10 truck. Purchased a salvage engine out of a Viper. The engine itself is the same. The exhaust manifolds are different, the oil pan and pickup are different, the water outlet is different, the throttle body (linkage) is different, motor mounts are different, and the wiring harness is different. All of the accessory drive is the same with the exception of a milled 'flat' with a threaded hole in it, on the upper idler pulley boss for a wire retaining tab. Not a big deal there. Hope this helps someone in the future! -- Dusty