Hey guys,New to forum and need your expertise.I bought a 2000 4.3 2wd automatic 2 door,nice shape.I junked out a 2000 4.3 2wd automatic 2 door last year that ran great but had rolled.I want to put that motor into the blazer but noticed a few diffs tonight.The computer in the truck has 4 individual plugs and the motor which has its full harness still attached,has 2 big long plugs.???It also looked like the VSS on the truck harness had one long prong to plug on compared to a typical two prong on the donor trans.Question If i take the harness off the donor engine and use the complete one in the truck will everyting still plug and play??other than the VSS that I found.And why the diff?? mid year change???Really need your help as I am doing this tomorrow.Thanks in advance Allan