Carb crazy

[olds307 and 403]

Start by replacing the TPS, that might be the issue. A bad TPS may be the cause with those symptoms. A non CCC 75-80 front inlet Qjet and Olds HEI vacuum advance distributor will be an easy swap. You will need to manually lock up your torque converter and possibly ground the black and yellow wire on the speed sensor for cruise. If you want a shiny new carb, the 625 cfm Street Demon will bolt to your stock manifold but you may need a spacer due to it's 3 barrel design and no matter what aftermarket carb you use need a geometry corrector bracket for the TH200 or 2004R trans. A Quick Fuel Slayer 600 cfm would be the best dollar for dollar Holley style carb.

 

[TURNA]

Funny everyone on this board that has a problem with a carburetor has a Q-Jet

 

[drogg1]

Funny everyone on this board that has a problem with a carburetor has a Q-Jet

Good thing you're here to remind them of how foolish they are...

 

[TURNA]

Good thing you're here to remind them of how foolish they are...

I didn't call anyone foolish.

The carbs are old and obsolete and unless the rebuilder been rebuilding them for the last 40+ years they will always have issues.

 

[L67ss]

They are far from obselete. And no you don't have to have built them for 40 years to get them right. I rebuilt my first q jet when I was 19 and stoned off my *ss. Just have to be smarter than the machine. And I've seen plenty of people have issues with Holley's and edelbrocks

 

[TURNA]

They are far from obselete. And no you don't have to have built them for 40 years to get them right. I rebuilt my first q jet when I was 19 and stoned off my *ss. Just have to be smarter than the machine. And I've seen plenty of people have issues with Holley's and edelbrocks

Maybe that's the secret you got to be stoned to get it right. I wouldn't know.

Like I said in my other post...

I am the minority here when it comes to the Q-Jets.

I use to run them but not anymore.

 

[L67ss]

In my opinion anything under 400 HP needs a quadrajet. Under 400 HP pretty much every engine I've seen with a square bore carb has a noticeable bog off idle. In fact we tested it on a 76 c10 me and a buddy built years back. Had a 350 making roughly 350 HP with a 600 holley that had a bad stumble. Swapped it for a basic rebuild q jet and the only time the stumble was there was on cold starts.

 

[565bbchevy]

The reason I suggested an older Quadrajet is this is a stock engine using a stock intake and it's hard to know what kind of clearance issues might be involved putting a Holley on with all of the factory emissions etc and the Holley fuel line might have clearance issues, also there could be vacuum ports on the upper runners that would require the carb to be raised even higher then possibly causing hood clearance issues plus the throttle and trans linkage has to be adapted etc.
So not knowing the skill level of the OP a simple R & R makes sense and eliminates possible issues.

 

[565bbchevy]

I have ran strictly Holley based carbs since my late teens but with any carb it needs to be properly sized and tuned for the application.
I feel most people that have tuning issues with a certain carb don't spend enough time learning to tune it properly especially with a Holley since most are not application specific so you have to expect to change jets, squirters, pump cams etc. to get it dialed in.
Plus having some tuning tools go a long way such as an AFR gauge etc.

 

[Casey Ray Lipe]

Thanks guys. Not stuck on Holley, just figure something other than electronic. Car never has been "hot rod", got a GTO for that. However, cruising at 60, floor that thing, transmission gears up down.......nothing. I literally mean NOTHING. Let off pedal, gears up slowly gains a little speed. Something is screwed!