I'm looking at possibly using the 8l90 in my build. I'm told that I may have to go with a 6l90 ...but I wanted to check with some tuners first. I already have an l9h I bought. Came with harness but no pcm or other electronics. Is it possible to make these two work or am I going to be forced into the 6l90? Could I maybe change some parts so a newer pcm from an 8l90 car/truck will work with the lh9?