[JVM225]

If you don't have the time or skills to do a good portion of the work yourself, then maybe you should consider gtohurstjudge's advice.
An added thing to consider with your present car is that while it isn't a GTO, anything you buy for it, or any work you pay to have done, will cost you what it would cost if it were a GTO. Yet it will never be worth near what a real GTO will be worth in the end.
I've had my car for about 16 or 17 years now. It was a good solid complete numbers matching real GTO when I got it with a mediocre re-paint in the wrong color over nice sheet metal.
I drove it home and continued to drive it for a year or two while I gathered my pennies to do it over. I was able to do most of the mechanical stuff myself, and then take everything off of it, gut the complete interior and dash, etc., before sending it out for media blasting followed by new paint in the correct color. Once I got the car home from the body shop via flatbed, I spent several months putting it all back together. I've enjoyed the fruits of my labor for many years now.
If I hadn't been able to do the lion's share of the work myself it would have been a whole other experience.
I have a friend that was looking for a classic car for years. He called on me to go look at cars many times for him over the last dozen or so years, and while some were dogs, others were nice worthwhile project cars for the right person. Since he has no real mechanical skills, or much time to do any of the work, I always advised him against buying the cars we looked at.
But he kept looking at bargain cars because he wanted to feel like he got a deal. He thought he was going to find that classic muscle car with 20,000 miles on it tucked away under glass for decades in some old lady's garage that everyone else in the world missed, and he was going to get it for less than 10 grand.
For years I kept telling him that the best way for a guy like him to get what he wanted would be to buy a finished car, and pay the price. It would be a lot cheaper in the long run.
This past summer he took my advice and picked up a really nicely done 69 4 speed GTO convertible. It's not numbers matching, but it has a correct coded motor, and was really re-done well. It took him many years to see the light and value of buying a finished car, and he is happy he went that way. He paid what I think was a fair price for the car, and was able to get something that he has done nothing but drive and enjoy for the last several months.
He didn't get a bargain, and he didn't steal the car. He laid out a lot more money than he had ever anticipated, but he could get his money back out of it tomorrow if he wanted to.
That's a pretty good deal!
I don't regard my car as an investment. Although I could get more for it than I have invested dollar wise simply because I've had it so long, my intention is to never sell it. That will fall upon my kids if they decide to get rid of it after I'm gone. I also strongly advise the average guy against thinking of classic cars as investments. The guys with the shops you see on TV might make money on the cars they re-do, but I'll bet they don't make a killing on all of them, and they have the shop, equipment, and staff to get the job done.
But while the average guy shouldn't get in to a classic car as an investment, he should at least try to be in a position where he can get back close to the dollar amount he has in to the car if the need to sell it ever arises. Chances of ever getting compensated for the time are slim.
While I'm sure it's nice, I tend to think that you may be hard pressed to fall into that category with your Tempest convertible.
You may want to either just enjoy it the way it is without investing anything in to it, or if you decide to get involved in a re-paint or other large scale expensive projects, you may be better off putting back on EBay.