Errrr.... No.
The VF-19A is nearly identical to the YF-19. But the VF-19F/S and VF-19Kai Fire Valkyrie are very different beasts.
Take a closer look at them in the art books. The Blazer and Fire valks have very different legs, shoulders, and shield than the YF-19 does. And the fuselage is a bit different too. Even the Fire Valkyrie's wings, though similar to the YF-19's, are different.
So you may want to reconsider the feasability of this project. If you're just looking to kitbash a YF-19, it'll take a lot more work than you may think.
But if you can make it happen, I'll pick one up. Though I think I'd prefer it in 1/72
That wasnt what I was implying. I've seen plenty of pictures and know the differences.
What I'm saying is those who do want to kitbash their YF-19 to a VF-19 Kai will have a easier time compared to someone who wants to kitbash their YF-19 to a VF-19S/F.
So what I'm wondering is if you're already going to go to the extend of making the VF-19 Kai, why not make the extra stretch for the VF-19S/F since it'll be harder to obtain for normal non kitbashing modellers.
As far as the feasability of this project, I'm pretty sure HWR MKII was well aware what he was getting himself into when posting this.
Edit: That reminds me, so how is the Monster coming along Ken? Gonna have an update anytime soon?