Steve's advice to drive the car is right on. You don't have much to lose besides a few quarts of oil. I suggest getting a tool to check compression - they're cheap and easily borrowed if you know someone with one. Test now, and in another 250 miles to see if things are improving or staying the same. This will also tell you the relative health of the rings/valves and whether your engine is sealing properly/evenly across all cylinders. I don't have the desired readings memorized, so go double check, but I seem to recall that when pressure falls below say 85 lbs, that's not desireable, and an engine with pretty consistent pressure is better than one with lots of variance, although the engine's design is very tolerant of varied pressures. I strongly disagree about putting a 440 into a 413 car, although it will certainly work and won't be obvious. Your engine block and heads are likely to be rebuildable unless there is some sort of failure or crack someplace, and the leaking coolant isn't a fatal flaw. Try BARS STOP LEAK if you have not done so already - the liquid in the jug beats pellets in my book. There are plenty of 413 cores laying around - I couldn't give them away when I was selling through a yard of 413's and 440's... Your machine shop will be able to tell what's up if they get to inspect the engine. Only weak point on 413 rebuilds that I know of is pistons, and they're just not as common but are still around. My position: Keep your car stock. If you do move to a 440, do you really want that old 413 hanging around your property through 3 moves and 2 states over the next 20 years? At the end of the day, it really doesn't matter that much which one you decide to do, but please don't give up on your 413 just yet. There may be hope. Kenyon Wills ____________________________________________________________________________________ Get the free Yahoo! toolbar and rest assured with the added security of spyware protection. http://new.toolbar.yahoo.com/toolbar/features/norton/index.php ----------------- http://www.imperialclub.com ----------------- This message was sent to you by the Imperial Mailing List. Please reply to mailing-list@xxxxxxxxxxxxxxxx and your response will be shared with everyone. Private messages (and attachments) for the Administrators should be sent to webmaster@xxxxxxxxxxxxxxxx To UN-SUBSCRIBE, go to http://imperialclub.com/unsubscribe.htm