Been there and done that too.....
Not a problem. The clocking was off just a bit, but a quick phone call to Piers (he told me how to clock it) and I was all ready to go in a short time.
The only real problem I had was actually bolting it to my truck. The HY has two studs on it and the other two are on the manifold. Piers turbo came with no studs and is ment to be bolted on. I had to run to the bolt drawer in my garage and find a couple of good bolts to fininsh the install. After that it was easy.