Hi, im a new guy here from va. I have a 1994 Chevy silverado ecsb 4x4 with the 350 Tbi. Im looking to do a swap to a 5.3 lm7 with a 4l60e both out of an 03-04 silverado. After reading several other forums who recommended coming here for info and advice.... I did! What are some compatibility issues I may run into? I already know about some motor mount kits that locate the engine 1" further back which presents its obvious problems such as crossmember and driveshaft discrepancies. Wiring and meshing my old harness with the new is where im gonna have trouble... any help would be appreciated. (I haven't started the swap yet as im looking to cost and information before I plow in knee deep since this truck is my DD)