One other thing is to stay with your plan. However you decide to build your car changing the plan along the way will cost you extra $$.
The money statements are right on. I spent a lot of time putting lists and prices together, thought to myself no way am I going to double that. Guess what, by the time I'm done it will be almost exactly double my original estimate.
I can't comment on the time. My project hasn't had a timeline from the start. I'm currently in my third year.
Last, certainly not least, what Paul said, the family, comraderie and expertise from the members of this forum is with out a doubt the best asset to your project. There is no better authority on restoring a GT/CS.
Two ways to go on your engine, if you have all the smog equip. etc. harder choice. If not, build it the way you want, if so, you can do internal mods to help with the pep and still keep it looking stock. I think your answer will mostly come up, it's your car do it the way you want it. Time for a new poll.