Belive it or not you can do alot to a 5.0 and still be legal in California. Thats one of the reasons I got a Mustang. I was sick and tired of looking for illegal smogs. Every year I had to go to a "test only" center. In CA guys charge $200.00 and up (easily) for an illegal test only. Not to mention being worried about getting "popped" for it.
You can have aftermarket heads,intake,t/b,headers, and more and still get it to pass smog.
Depending on the build date, it may already have dual mufflers and tailpipes. (All '85s had single exhaust before the muffler(s).) If the exhaust is converted to "true duals", the EFI system will be lean. Good luck trying to get the CFI system to work with that. Then you still have to pass Cali emissions.
And good luck getting a carburetor conversion past a C.A.R.B. referee.
id be happy right now if i had a hook up prob the prob right now is not enough power to lose traction lol yeah in the future i plan on gtting the frame stiffed up and supspension worked on but right now trying to get info on this weak e.f.i cfi setp thanks alot for that info my buddy had a early 90 gt and couldnt hook it up cuz had mods to motor and none to frame suspenson thanks for the info
What you could do is go with emission legal heads, cam, shorty headers, and so on just like the 86 and up cars, you're just limited by the intake choices you have.
The Edelbrock Performer 302 2V intake with EGR plate is 50 state legal, and that would accept the throttle body injection you have.
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