i bought a 90 lx that was converted to a 5.0 it has a 75mm throtal body and a 75mm sensor mac headers and 2/1" pipes what size injectors should that set up have and how can i tell what injectors i have.the one's in are a yellowish brown color thanx
your throttle body seem a bit large for your combo and could be making for some "lazy" air in your intake. The meter is fine so long as your bottom end drivability is good. Most meters these days have pretty good low end resolution regardless of the amount of air they're capable of metering up top.
For one thing it will have plenty of flow for your engine as it now is, and it wont be soft at the bottom end that the bigger TB just might be. With your mods the top end wont make up for the soft low end.
Ditto what these guys said, 65 or 70mm throttle would be better for the combo. Injectors are good until at least 300hp, so until you do H/C/I, you should be fine.