I heard Jay Leno one time sate "if your making money restoring cars your doing it wrong". I have done several as I call them "rescues". Cars that needed desperate help to make them run and drive safely. Or just get them back on the road. There is money in doing that all be it very little...
I took a bunch of stuff to Spring Fling a couple years ago to sell, not to show and transport back home. I bartered some but made sure the other guy took it home and not me. Git rid of a lot, had no offers on others.
I like to see the projects creative people build. For example, I am not a low rider guy, or bouncing cars. But to look at how those guys build them, the ingenuity and craftsmanship is out of this world. You have to respect that.
It can be restored. Does the cost matter to you? I would estimate the mechanical and interior restoration will cost around $20,000 not including any labor. That is doing it on the cheap using used parts and rebuilding/restoring what you have when you can. Sunroof parts are going to be almost...
Have the quarter panels been replaced? They may not be in the original factory positions. Same if the doors have been straightened out in the past. General build quality, panel alignment, door gaps, etc. were not all that good to begin with 50 years ago.
It is not a cheap swap. Everything has to change.
Trans, since the big blocks have a different bolt pattern. The 904 you most likely have now wont bolt up to a big block, you will need a 727. Your 904 does not have the same linkage you will need with a 727. Get all the 727 linkages including...
My 72 Charger weighed 4200# with me in it. 3.91 gear sure grip, automatic, 275/60-15 tire. Dynoed at the tire 255HP, 350 TQ. Ran low 15's quarter mile. Best run ever in Vegas was a 14.9. You are very similar in weight and power.
Ebay is your friend. You will find some decent housings on there sometimes. Prices are going up, but they are there. I have repaired many. Plastic weld does work. Finding a good housing that needs little repair is the best bet.
This is my Silver 73 Rallye I am referring to.
No filler plug either, just an open hole.
It has no fender turn signals either, so I would say it does not have the A01 package.
My Yellow 73 Rallye has all of that.