The Forums will be down, Friday, November 24th starting 8 AM PST for upgrade.We'll probably be down until 1PM PST, but it might be longer. I'm doing a major forum software upgrade, so I expect the forums to operate somewhat differently when we come back online.
That is a cool car. The rear spoiler on the real car in your picture is different than what's on the body in the early Monogram kits (Pace Car, Cobra, Cafe Racer) or included in the MPC 1983 and 1984 kits. It looks more like the bottom section of a Mustang SVO spoiler, and it might actually be the part that Ford used on the 1:1 '85 and '86 Mustang GT. Unfortunately, no one made a '85 or '86 GT kit....not sure if anyone may have made that spoiler in resin.
You're welcome. If you go the MPC route, I'd recommend looking for the kit in my pictures. It's the 1983 kit, and is molded in dark blue. This kit has clear windows, but MPC went to deep-smoke tinted windows in many 1984 kits, so the "sparkling" red one and the white 20th Anniversary car may have nearly black tinted windows. Agree with Steve M. on price, $80US sounds really, really high for one of these MPC kits. The scoop is included in the blue kit as well (it's separate from the hood), and it's a fairly simple part that shouldn't be too hard to make from sheet plastic if you go the Monogram route. If the racer had a stripped-out interior, the MPC would probably have the advantage there. Looked at the body in my '83 MPC kit, and it is missing the three vertical ribs in the grille as you mentioned. The rear spoiler is a separate three-piece assembly. MPC also has taillights molded in clear red, which will be more difficult to paint....if I remember right they are molded in clear in the Monogram '83 convertible. The Monogram might give you more options for wheels and tires, since there's probably more to choose from in 1/24 scale. Can't remember for sure, but even the 1/25 Revell Mustang GTO racer shown above may have used 1/24-scale tires from an earlier Monogram race car. Both bodies (MPC '83 and Monogram '79 Cobra) have bodyside moldings in place. Looks like the car you want to make didn't run them, so both bodies will need some work to remove them. It's a cool project. From the little I've thought about it, I'm not sure if I'd start with Monogram or MPC. There are good arguments for both.
You're on the right track. The car in your pictures appears to be a 1983 or 1984 Mustang GT. The only one of the three you've listed that I have is the #2260 Mustang Cobra. Was easy to get at it, so I gave it a quick look. it has two depressions on the outside surface of the rear spoiler. Monogram's inventory-control numbers engraved on the inside of the body indicate the #2250 Pace Car and #2260 Cobra bodies were identical except for molded color. The #2276 Cafe Racer likely has the same body, but my kit was almost certainly made before that one was released so there are no engraved inventory numbers for it on my body. The #2260-style body is molded with an open sunroof, so you'll need to deal with that. There is a clear sunroof piece included, so you should be able to start with that to plug the hole in the body. Don't think Monogram ever made the hood scoop you need, but MPC's '83 and '84 Mustang kits had it. Those are 1/25 scale though.
At least one issue of MPC's Datsun pickup had a cap. This Black Hawk is the 1979 "annual." Revell included a camper top in one version of their Datsun King Cab 4X4 that came with some wet bikes and a trailer. The picture is from Revell's 1983 catalog. And the MPC Branding Iron El Camino had a cap too.
I use Faller Super Expert. It's similar to the Testors, a thickish liquid somewhere between tube glue and a thin liquid cement like Tamiya. This has a metal applicator, and it's very easy to control. Good stuff. I've bought from Walther's, and have seen it at several hobby shops with good model train departments.
I've already ordered a Panamera kit, but like Bob said the Sport Turismo would be my first choice too. Still I'd be much more excited by a current 911. Have several 991.1 and 991.2 diecasts, and even a few 991.2s in 1/87 plastic. Good to hear that Welly has a 1/24-scale GT3 RS in the works. Have Welly's 1/24 Carrera S, and it's BLAH_BLAH_BLAH_BLAH nice for a moderately priced diecast.
The Early Iron '32 kit was the last one with the Pontiac engine. The kit was reworked quite a bit for the yellow w/ black flames issue that first came out around 1985, give or take. It picked up the SBC then, along with the wire wheels. A few years later there was another rework with a 3-window coupe body added for a Beach Boy's Little Deuce Coupe kit. That kit is where the steelies wheels and caps originated...they've been in all issues of the roadster since the McDonald's one. Yes, those "Little Deuce" decals were a nod to the kit's origin.