trex, I know where you're comin' from, things like this bug me too. It's not overheating but, it's not as cool as it was (or does not appear that way). A couple months ago I changed most of the parts you changed on my 65 with a 230. Didn't make much difference in temp UNTIL, I swapped the stock 4 blade for a nice 6 blade and added a fan shroud which P/O had removed. The spacer I got put the fan nice and close to radiator. BIG difference. She's ready and steady even when sittin' in traffic under the California sun.