It's never a waste bro. I've been dealing with this issue on my GST for a while and noone else has posted the cause in their forum. So here we are 5 years later and you may have saved my ass.
I'm in the process of doing this to my 1997 Eclipse spyder. you have to order the timing belt from a deliverhead cam 4g64 which comes out of a gallant. Other than that the only thing I've had issues with was a pigtail I had to buy for my cam angle sensor you could modify the wiring but I didn't...