Author Topic: I NEED HELP  (Read 5419 times)

79LIKEAROCK

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I NEED HELP
« on: August 02, 2001, 01:24:00 AM »
IM HOPEFULLY GETTING A 79 CHEVY WITH A 350 SMALL BLOCK 3/4 TON BUT ITS IN TEXAS MY QUESTION IS IF I NEED TO PUT CADDILACK CONVERTERS ON IT FOR IT TO PASS EXPECTION IN MISSOURI IF ANYONE HAS ANY INFO ABOUT THAT PLEASE EMAIL ME AT NHSWRESTLINGSTUD@AOL.COM OR IF YOU HAVE AOL MESSENGER INSTANT MESSAGE ME MY SN IS NHSWRESTLINGSTUD
                            THANK YOU
                            79LIKEAROCK


wayneselleck

  • Guest
CATS.
« Reply #1 on: August 06, 2001, 08:49:00 PM »
Well what part of mo do you live in?If you live in a city then they might want you to.But some trucks were exempt from emissions.since yours is a 3/4 ton it might of been.I have a 77 heavy half and it was exempt.I live in washburn mo ,down southwest.And we dont have to.
     


edelbrock350

  • Guest
Exhaust..
« Reply #2 on: August 12, 2001, 03:02:00 PM »
I live pretty close to missourie and i'm in the city and i don't have them on my 73 1/2 ton.now that i think of it i have strait pipes.


j in la

  • Guest
??????
« Reply #3 on: November 06, 2001, 10:37:00 PM »
why would you want cadillac parts on your chevy truck?lol!!


Offline ChevyGuy

  • Frequent Member
  • **
  • Posts: 268
I live in TX
« Reply #4 on: November 07, 2001, 09:28:00 AM »
Well guess what i live in the great state of Texas....lol.
The laws here said if it didnt come with catalytic convertors then you dont have to have them. I own a 76 and its a heavy half and they didnt have them on the heavy halfs. So if your truck doesnt have them on it and its from Texas most likely you dont have to have them unless someone had good friends at a garage that inspected vehicles.


KIILew

  • Guest
Converter question
« Reply #5 on: November 07, 2001, 11:48:00 AM »
With respect to Chevy/GMC trucks, catalytic converter aplications are as follows:

1974 and earlier trucks - no converters were used on any vehicle (including passenger cars) prior to the 1975 model year.

1975 thru 1977 - all 50 states - catalytic converters were used with all engines (except for the 454 V8) on all standard 1/2 tons (i.e. all models under 6,000 lbs GVWR).  Heavy duty 1/2 tons (i.e. Big 10's/Heavy Halfs), 3/4 tons, and 1 tons did not use converters.

1978 - 49 states except California - same rules as for 1975 thru 1977, except that catalytic converters were added to the 454 engine used in standard 1/2 tons (removing the previous exception noted above).

1978 California only - AND  - 1979 all 50 states - ALL models up to 8,500 lbs GVWR use catalytic converters.  Thus all 1/2 tons (including heavy duty models) and 3/4 tons use converters.  Only 1 tons do not.

1980 thru 1986 - all 50 states - same emission laws as 1978 California and 1979 all states.  However, Chevy/GMC added a line of heavy duty 3/4 tons with 8,600 lb GVW's which did not use catalytic converters.  Light duty 3/4 tons (under 8,500 lbs gvwr retain the converter.

1987 to current - all 50 states - all fuel injected engines in all models use converters.  Carburated models do not.

Therefore, your 79 3/4 ton did originally have a converter.  (But your local area may not enforce the original rules, especially on such an old vehicle, so check before you spend the money on the repair).  Hope this helps!