Car Builder Turns a Rusty Facebook Marketplace Mustang Into a Childhood Bullitt DreamDustin Hallinan of the YouTube channel Driveway Finds has been chasing a green fastback Mustang since the age of nine – when his dad sat him down in front of Bullitt – and the car that started the obsession sold at auction for money he simply doesn't have.The original Bullitt hero car, a Highland Green 1968 Ford Mustang driven by the inimitable Steve McQueen, fetched $3.74 million at Mecum's Kissimmee auction in January 2020. So Hallinan went a different way: Facebook Marketplace and a trailer.What he found in Utah was a heavily patinaed Shelby GT350 in name only – a straight-axle, engineless, rust-floored 1967 fastback with enough genuine Shelby hardware to keep it interesting. What it had going for it, in Hallinan's own words, was "that million-dollar cool-ass look." He and co-host John Brito loaded it onto the trailer anyway and pointed the truck home.AdvertisementAdvertisementThey'd driven 14 hours to get there. Turning around empty-handed wasn't really on the table.The pair nicknamed the car the "Felby" – a fake Shelby – because while it isn't a genuine Shelby, it wears enough real Shelby hardware to make the nickname feel more affectionate than insulting.What followed was months of the kind of work nobody puts in a highlight reel: floor pan patches, cowl replacement, wiring harness surgery to strip out a resistance wire Ford buried inside the under-dash loom, a straight front axle cut out in favor of stock suspension, and a headliner Hallinan swore would be his last.The Engine Cost $1,000 and Was Already Half-DeadThe powerplant for the build was a 1966 289 V8 sourced from – where else – Facebook Marketplace, for $1,000. The bearings turned out to be well past their best, with visible copper and wear lines suggesting they should have been replaced before the car ever started.AdvertisementAdvertisementHallinan's solution was a high-volume oil pump and 20W-50 oil. Thick enough to buy some time, cheap enough to fit the budget. A proper rebuild would have been the responsible call, but responsible calls don't really describe this incredible project.After finding the right oil pan on the third attempt, Hallinan installed the harmonic balancer, water pump, and timing chain cover before painting the whole thing Ford Corporate Blue – an unusual choice for a team that usually reaches for orange.A garage-sale solenoid tried to ruin the first start. They swapped it, hit the carb with brake cleaner, and the 289 fired. A carburetor assembled from five different spare carburetors, running an engine with questionable bearings, in a car that wasn't a real Shelby. It ran.Once the exhaust shop finished their work, the Mustang rolled onto public roads for the first time. The brakes needed attention, the carburetor needed tuning, and the engine smoked heavily until a valve cover baffle issue was tracked down and fixed… but the car drove, and more importantly, it looked right. The stance, the patina, the Shelby pieces, and that fastback roofline came together the way budget builds always hope to but rarely manage.AdvertisementAdvertisement"As soon as I saw this car on Facebook Marketplace, I instantly fell in love with it," Hallinan said at the start of the build. That's maybe the most honest thing anyone can say about a project like this. You don't choose it rationally, you choose it because you can already see what it could be. Twenty years after watching McQueen throw a green fastback sideways through San Francisco, Hallinan has his own version. It smokes a little less now, and it cost considerably less than $3.74 million.