Welcome Chevy-80,
It is very nice to have international people here. I find it real interesting how a Chevy made to Amman.
I think that there is a lot you can do to get better perfomance and better gas mpg.
I the US we have smog laws and cannot leaglly remove smog devices. If your truck is an American 1980 the it has smog smog control devices that can be hurting you, mpg and power.
The cataylitic converter can restrict exhaust. There are also ignition timing retardation devices that can be a problem.
Like Twisted said just a carb alone won't help.
Dual exhaust without cat converter is good, with headers is better, with long tube headers better yet.
To increase mpg unrestrict intake and exhaust and play with ignition timing.
There are many improvements that can help, but we need to know how far you want to go.
Welcome
Luis
