I've got a stock 1988 4.0 with 120,000 miles in my Comanche. Compression ranges from 130lbs to 110lbs. Are these numbers acceptable for the 4.0? I also have a 1995 4.0 with 85,000 miles out of my Cherokee that I might swap into the truck. I can see that I'll have to change the fuel injection and the distributor but is there anything else? If these compression ranges are acceptable then I'll just stick with the same engine. Any feedback?