Wow, that is a great prize! When I got my timing chain kit from them back in the day, they called me to confirm which generation of 22RE I had in the car, and I was amazed that they knew more about my car sight unseen than I did. (I'm also amazed that there's a shop who can make a living off of rebuilding 1 and only 1 engine that hasn't been made in almost 30 years...shows what a cult following can do for you.)
You'll have a chance to replace any and all of the coolant and heater hoses, rubber fuel lines, etc. with the engine out (spoken by someone who recently saw an, um, unplanned rapid coolant release), but one thing I really liked about the gen3 Celica was that a lot of that stuff isn't hard to get to anyway? Still, it'll be even easier!