[Turbo77Z]

I am looking at putting an aftermarket EFI on my 77 280 with an 83 turbo engine. Will it pass emissions? I think I have to have an EGR valve here in NV and I don't know if these systems use one.

 

[Turbo77Z]

What if...

I was to make it look as stock as possible? I think the turbo and intercooler might be a dead giveaway but will I be able to make as run as clean as stock with a cat?