After just having finished the final bits of a 25DET transplant in my cousins 33; listen to Pete and everybody else here, take the easy option Dom... sell and buy a gtst.
I know you don't want to get rid of your car because you've put time and effort into it, but it will be worth it in the end. You'll end up spending more on all the parts needed, labour (if you're not going to do it yourself), etc than what you will if you sold your car and paid a few $k in difference for a gtst.