Crate 7.3?
Here's something else to tell your folks...most of if not all engine remanufactures require the engine to be installed by a shop in order to honor any warranty thinly offered.
You'd do well to find a used engine.
You'd do well to rebuild yours...any school auto shop programs in your area? Might be able to get class credit and rebuild an engine.
Lots of horror stories on these forums of folks with freshly rebuilt engines that crap out. Sometimes it just happens. Also hard to find quality parts and workmanship these days.
I'd recommend S and S engines out of Spokane. They typically have several months of lead time.
-Mac