He seems to do that a lot/resurrect a lot of dead posts.
OP, you may want to try and source something from a 4.6 2V as it is likely a cross over part. Since you have longtubes I expect some fab necessary like you are encountering. Does your state have emissions testing (I Missed it if you already said this)? If not, I would leave it EGR deleted and just deal with the readiness check failing, as if it is disabled in the tune your car should run fine.
Good Luck either way!
2003 Redfire & Black V6. Full suspension, 8.8 w/ 4.10s, tuned. 4.3L stroker + turbo capable of 550 hp soon
1992 5.0 Auto Hatchback...needs wiring, interior, ...basically everything
RIP: 2015 SHO PP, 12.87 @107 1/4 mile