The 1947 - Present Chevrolet & GMC Truck Message Board Network







Register or Log In To remove these advertisements.

Go Back   The 1947 - Present Chevrolet & GMC Truck Message Board Network > 47 - Current classic GM Trucks > The 1973 - 1987 Chevrolet & GMC Squarebody Pickups Message Board

Web 67-72chevytrucks.com


Reply
 
Thread Tools Display Modes
Old 07-03-2004, 07:26 PM   #1
RPOZ11
72 BB C30 Super LongHorn
 
RPOZ11's Avatar
 
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
84 GMC Sierra 15 305-700R4 questions

Hi! Just bought this truck & Im dialing in the little things. It is a Gov't ordered fleet truck, has the 305, 700R4 set-up and unfrotunately the under dash computer for the emissions and the carb & distributor.
Anybody here have any knowledge dealing with these, getting more performance out of the 305 and still stay within the smog laws guidelines? Im in California, so Ill have to stay within the limits. I did look up cams, seems CompCams has a C.A.R.B cam, but I would like to get more out of the heads and intake for better all around performance.
Any thoughts here...??
Thanx!
__________________
72 BB C/30 Longhorn Super
HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM


HO72 build :
http://67-72chevytrucks.com/vboard/s...d.php?t=714492

2017 SS
RPOZ11 is offline   Reply With Quote
Old 07-03-2004, 07:44 PM   #2
plumbcut
california fill
 
Join Date: Apr 2004
Location: Sunny So-Cal
Posts: 694
Being a gov't ordered truck, Im wondering if its affected by the same california emissions standards that the civilian trucks were?

pc
plumbcut is offline   Reply With Quote
Old 07-03-2004, 08:01 PM   #3
RPOZ11
72 BB C30 Super LongHorn
 
RPOZ11's Avatar
 
Join Date: Nov 2002
Location: Chavez Ravine
Posts: 1,606
OK, after just recently clearing smog inspection, this is what I was told: The Federal issued fleet 305 trucks are exempt on a failed check engine lite on the dash panel...Seems this was what was done, the lens is there, but NO opening at all for the light socket nor any wiring present. The smog on this Truck is as follows: Smog tubes on the drivers side and NONE! on the passenger's side! There is an O2 sensor only on the driver's side exhaust manifold. Basically everythiing aelse is there for the emissions valves, etc as well as the catayltic convertor.

I am sure I could use headers that are C.A. R. B. legal, and I am considering an aluminum GM intake used on passenger cars that is Identical. I would then gasket port match the runners only and maybe select a set of "882's" and have the hard seats installed and then gasket port matched as well. I am sure that any more porting beyond that might trip the Emissions readings at the time of a smog certificate demand.

Let me know what ya guys/gals think...
__________________
72 BB C/30 Longhorn Super
HO72 No-Spin, #'s matching, Tilt, Tach, AC, AM/FM


HO72 build :
http://67-72chevytrucks.com/vboard/s...d.php?t=714492

2017 SS
RPOZ11 is offline   Reply With Quote
Reply

Bookmarks


Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 10:36 PM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
Copyright 1997-2022 67-72chevytrucks.com