I have a 73 240z in springfield - good shape - some rust. Garaged for the last 16 years - never driven in winter. Weber carbs - DGV's. Fast and reliable. Cragar SST solid wheels - sharp! WOuld want 5500 - have some parts also.
What's up with that! Looks like someone pissed in the gas! Looks like a complete cleaning of the carbs will be needed - given all the crud in the gas! Did you relace the fuel filter - I'm sure you did!