Happens all the time. Just learn from it. I've tried to fix parts on my own truck just to find the cause was something else. At least it wasn't a customer's vehicle and wasn't really that expensive.
1999 silverado rcsb. 6.0L and. T-56, Hurst short throw, 4.11s, auburn limited slip, 3/4 drop, Nelson tuning, Texas Speed 233/239 .595"/.603" Camshaft, Kenwood everything, electric fans, custom made hood, custom tailgate, magnaflow 3 inch true duals, hooker headers, and too much money.
Soon- wheels and tires, Ford 9 inch with 5.13 gears.