Congratulations!
Only have a minute Mike...but here's the overview. If you've had 740's w/B230, I find both cars VERY similar mechanically. Aside from the obvious such as replacing the timing belt if you're not sure it was done recently...make certain teh frain holed for the trunk surround aren't clogged...and go throughout the car with an aerosol can of white lithium grease to attack all hinges. The odo problem is most likely a broken nylon gear in the gauge which can be replaced in about an hour...see posts...As with any car...clean the engine thoroughly (I use gunk engine cleaner on a warm - NOT HOT engine) with a stiff paint brush...and lightly mist the engine with a water hose once it cools completely. A clean engine will let you monitor and address any leaks. Also, you'll want to clean/replace tghe flame trap, as a dirty one (or hoses leading to it) can cause seal failure and oil leakage. Best of Luck - Dennis.
'66 122
'89 240
'90 240