Well, you have great upgrades and a failure is much more expensive than buying a complete new unit with the ability to sell or keep an undamaged original. In just a few years you won't be able to find a new 5.8 block easily.Hmmm, short block or 2650 tvs...
Gotta save...
Plus, unlikely you'll be adding a 2650 and keeping it under the power level that really requires a built engine.
With your current mods, if you race the car, your current engine is on borrowed time.
Hard number to swallow but the quality is there.
-J