Well, I took the 88 for a very long drive, 225 km there and back. It ran 210 at most, around 205 most the way. Oil pressure was 36 to 40 psi with 5W30 synthetic. It is a 47 year old bottom end, so about right. It used some oil maybe a 1/4 quart, thinking it was a bit over full. I plan on using a different stick, this one fits way too tight since removing and putting the tube back in. I have many, one goes in much better, just none the right length. Going by 4 quarts in the pan and will mark. Mileage was meh at 19 mpg imperial, but not taking it easy following our Challenger GT, 60 to 70+ mph. My speedo reads about 5 mph slow according to my GPS speedo app. I drained but left the filter, only 250km on the filter and put in 4 quarts of VR1 20W50 in, guessing that the level is right. I pulled the thermostat, 195 like I thought and put what I think is a Robert Shaw 180 high flow, no temp, just a number I can't find online. My other Robert Shaw says 160, so it must be the 180 I bought. Not that 210 degrees and 40 psi max hot oil pressure at lower rpm, 1800 to 2000ish is bad, about normal for every new LS I have driven. I just want it even a couple of degrees cooler and higher psi. The trans shifted great and leaked very little fluid. Around 20 mpg isn't what I hoped but 4 mpg better than my Dakota.