There are a number of small and unrecognized brackets and fasteners that don't get to see daylight at all that can add up to a few pounds when you take some time to study the land scape of your car.
Cautious regime change is what I call it.

Though this specimen (a Detroit based street race Ruggirello-Roush built Mustang two)is exactly the point of P-body's earlier suggestion on starting a light weight racer with a lightweight chassis/body to begin with, I found it funny in the story that said that the car here needed to go on a diet along with a power upgrade.
That thing must have been so light that it was mistaken for Ben Franklin's kite before the lightning storm. LOL

Wonder if this 'Stang ever met the Silver bullet at the OK corral?

Single file or in formation as: Heavy weight, Middleweight, and Welterweight. The featherweight is the Pony above this reply.

Though not available retail or wholesale, (Unless you know a friend at a hardware store) this gem of a shop tool has taken out all the guess work when figuring the tread and length of each bolt when ordering from any of the aluminum warehouses. My friend Special K knows each and any bolt by simply looking at it. My IQ level is just not set for that kind of rocket science. LOL.

I snapped this just for you after I noticed it was different than the 65 one on my car. Notice the difference in the height after the radiator support.
This is on the 63 330 parts car I picked up.

Yeah, it seems a little lower. I gather this is a template for your AFX altered wheelbase project. Probably the fastest way of garnering that coveted Car #558 45-60% rear end ballast.

Lee...It is a little shorter yet mounts lower and is a longer distance from the rad support than the 65...check your PM's...

I have built many special systems and the only problem your going to have is cracking due to the heat cycling and vibrating, just make sure it's supported good and keep an eye on it as it ages. You'll be fine.👍🏼. Good luck Al

Thank you. Are you referring to the exhaust?

See that big hokin brace going from the bottom of the core support to the top supporting the hood latch? Race cars have hood pins (aluminum of course). Replacing it is a piece of thin wall 1/2" moly tube.
Doug

Yes I was referring to the exhaust, I built a lot of custom race car stuff when I owned a shop. With that being said it's great to see someone think outside the box. Just support the system well and keep an eye open for cracks, no a big deal if you can tig weld, looking forward to seeing it all done😎Al

FMJ,we need to see how it picked up with the weight loss so far.
In order to test, to go to the track,,,,,,,don't forget South Mountain,,,,,,,,,

Just saw this today, cool write up. Congrats Lee!

http://www.hotrod.com/cars/featured/1512-lightweight-1965-dodge-coronet-a990-clone/

Lee I will post this over here. Loved the article on your car. Headers are listed as Kooks. Are they a production piece?

The Kooks were custom made by Kooks themselves over on Long Island just before they moved down South.
They are three piece step down break away units made for the offset of the mill.
Wish at the time there was a budget to make 'em out of Titanium.

Next week I`m heading over to Nutty bolts to replace all of my fender, radiator and carb fasteners for starters and will weigh em and post the savings..........

Any one that gets an order from their Doctor for good cardiac exercise, look no further than cutting Titanium of any size thickness. LOL. You can cut a piece in two and it won't fall apart till literally the last strand of metal is cut in the cut line.
Don't try this at home.

Rear shock plate shock mount stud in the 6AL4V stuff.

Are you going to drill it through the center?

No. I don't have the equipment nor the time nor the desire since the stud is light enough and there is a lot of vertical load on them from the weight of the car through the shock, especially on launch.