Sounds like the 2,110 that I built with 40mm Dellortos.
Hop in at any temp, pump it 3 times and it starts right up and settles down in less than 30 seconds.
Sounds like the 550 owners need to have someone who knows what they're doing set up those Webers, like Danny Piperato ( @DannyP ) or Blackline Racing in Utah.