a few weeks ago i posted a problem with my 1971 C-10 and I wanted to give you guys an update on what I found. I did a LS1 engine swap out of a 1999 z28 into my old chevy. I had a running issue after it was running for a few minutes and I am happy to say I got it running correctly after I discovered the O2 sensors wires were not labels and were incorrectly switched. Once I switched them the truck runs awesome. What a fun truck to drive. I wish I could post some pictures. If anyone wants some shoot me an email at methirty.eight@yahoo.com and I will send some. THanks for the help.