I have a 1996 chevy 2500 with a 4L80E trans that has a blown 6.5. I have the opportunity to buy a 1995 3500 dump truck with a standard shift that has a lower mile 6.5L. I can't find anywhere on the internet to tell me if these two engines are the same. I seen forums that say the 94&95 are the same in their own right, but doesn't really explain as to why. All the components on the front of my 96 and the possible donor 95, ie; alternator etc, all all located differently on each engine. I do not know if the engines are the same where the bolt holes are such as same locations and thread sizes to be able to take all the front components off the 96 and swap them to the 95?? Are the tranny bolt patterns the same from the 95 standard to the 96 automatic 4L80E to bolt the 4L80E to the 95? Despite the front parts, are these two engines the same? Are the oil cooler line ports the same thread size, in the same locations? Is there anything different as far as oil pressure switch, sensors, what makes the fuel pump on the frame operate, anything at all that would make this either not a good swap, or I would need to know to make the 95 work in the 96 truck properly? Or will it not work all together and I should not buy the 95 truck at all. The 95 truck will not start because the prior owner got wire chopping happy to where there is no juice to the glow plugs, he cut in a cheapo ignition switch hanging from the column. I tried putting power to all the wires that went to the original switch, but could not get anything else, like glow plugs, to work. I heard it turn over, sounds like it wanted to maybe kick with starter fluid, but didn't! I even hot wired the pump on the frame, prior owner claimed that the pmd was new and it has been relocated, but still nothing,, but it turned easily, did not have any noises and only supposedly has 80k miles on it (says the speedometer)! So, with that said, and the engine actually looks clean yet, I am hoping wired properly it would start. But if these are 2 totally different engines due to year or transmission bolt pattern, etc.., I do not want to waste the money buying the 95 and taking that chance. I am really hoping to find maybe someone who worked a GM dealership in the 90's who really knows their stuff and these 6.5's inside and out!! If you are out there,, and can help me with these questions,,, oh thank you!! Thanks to you all for reading my dilemma and I hope the Guru I seek is among you!