Long-time 3rd gen guy here, still working on my own. Got tired of scrolling YouTube and bouncing between a dozen browser tabs every time I needed to figure out whether a part from some other car would fit mine and whether it was cheaper or an actual upgrade.

So I built a landing page for a tool that answers all that in one search. You pick your year/make/model and the system you're working on, and it shows you three things:

1. The stock replacement, new and used prices
2. The same part from a different production car that fits — often 20-35% cheaper (like the Saginaw 800 steering box from a '73-87 C10 truck that's the same part as what's in 2nd/3rd gen F-body but runs $20-80 less used because trucks are everywhere in the yards)
3. The real upgrade path from other production cars, with install difficulty (like the WS6 Trans Am 12.7:1 quick-ratio box — direct bolt-in to any 2nd-gen)

Not selling anything yet. Trying to figure out if I'm the only one who would use this.Mockup's live here: https://enchanting-panda-f3ae5d.netl...mpaign=organic

Would appreciate honest feedback from this crowd — is this useful, is it missing something obvious, and what platforms would you want covered beyond 3rd gen Camaro, Fox body, Square-body C10, XJ Cherokee, SN95, etc.? Email signup on the page if you'd use it. Early access is free for the first 500.