Your truck is sweet, and if you wait long enough you should be able to find yourself a better deal. And I wouldn't be in such a rush to get married, you're young still.
I think you should have just kept your old truck. Not trying to argue, but this is alot of trouble to go through just because it had a water leak.
And if I recall right you guys haven't even been together that long. I could be wrong though I'm not sure...? Not trying to tell you what to do with your life, but just to think about it.
Sleeper I think you should get married, have 3 kids, and buy a civic all in the next year. Maybe reverse psychology will work.