I just scored a 17057274 (1977 Trans Am 400) and it has, at one point, been commercially rebuilt, something I'm not very fond of but, hey, what can I do ?
Anyway, I tore it apart and measured it, I'd like to know if someone knows if those are the original "sizes".
Main Jet: 72
Main metering rods: 43L (.026 tip)
Main air bleeds: .070 and .057
Idle air bleeds: .068 upper
.070 lower
Idle tubes: .033
Down channel restriction: .0465
Idle discharge port: .090
secondary metering rods: DB
secondary hanger: K
accelerator pump discharge holes: .026