Yes, I had the same rust problem, Edward. This is often our problem
with these cars, particularly if they haven't run for a while.
With that US spec car, I had excess fuel pressure, an exhaust valve
sticking not quite shut, rust comming from the fuel tank, one worn
float valve, petrol in one plastic float, & a crook wire [broken,
but touching inside the insulation] to the coil.
Every time I thought I had the problem sorted, I found a new one. I
fitted a pressure regulater, but it used to stop the fuel flow
entirely, when ever it got a dose of that rust.
Still, the young bloke who bought it from me, after it was sorted,
drove it to uni for 3 years, with virtually no problems, so it's
worth the effort.
Hasbeen