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Old 05-30-2020, 10:23 PM   #1
Andy4639
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Question Stock 350

Been playing with the 64 SS Impala today. I had problems with it running ok then not so much. I have set the timing I don't know how many times on it. I keep setting it at 8* BTDC with vacuum plugged off.

It will idle just fine. It will drive just fine for several days. Then it's like somebody moves the timing on it. Not much but enough to make it sputter when you give it the gas while driving it. I just finished setting it again. I'm wondering if it is the hold down bolt? I tighten it down good but don't want to strip the threads since it's aluminum intake. It's like 1-2 degree off each time.

Could it be the springs maybe in the dizzy? Give me some idea's I really want to get this straight before I sell it.
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Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 05-30-2020, 11:57 PM   #2
geezer#99
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Re: Stock 350

Is it 1 to 2 degrees retarded when you check it. A loose distributor will rotate clockwise when loose.
Is this a points distributor?
What’s the idle rpm when hot?
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Old 05-31-2020, 08:00 AM   #3
Palf70Step
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Re: Stock 350

I helped a friend with one and his was similar issue. Problem with his was the distributor hold down seemed to be soft metal and it would flex and slowly bend thus allowing the distributor to work loose and get the timing off. Found and old hold down clamp in my stash and it worked good after that.
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Old 05-31-2020, 09:00 AM   #4
blazer2007
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Re: Stock 350

I too had similar problems like that and changed to a old style dist. clamp,also check the clamp is fully on the dist.,had that problem too ,couldn,t see that only one ear of the hold down clamp was touching the dist. Kinda hard to see back there sometimes.
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Old 05-31-2020, 04:33 PM   #5
Andy4639
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Thumbs up Re: Stock 350

HEI no points. Yea it always seems to be retarded.

The hold down is what was on it when we bought it a chrome hold down! This maybe it then. I will get a stock one and try it. Thanks guy's.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
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http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 05-31-2020, 07:05 PM   #6
WorkinLonghorn
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Re: Stock 350

I had a car that had the advance weights sticking in a slightly advanced position and throwing off my settings. I doubt that the hold-down bolt is the culprit. Lube the weight pivot points (carefully). -BA
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Old 05-31-2020, 07:22 PM   #7
67ChevyRedneck
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Re: Stock 350

Mark it with a couple paint dots after you try out the new hold down to see if that was it for sure.
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Old 05-31-2020, 08:30 PM   #8
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Thumbs up Re: Stock 350

Quote:
Originally Posted by 67ChevyRedneck View Post
Mark it with a couple paint dots after you try out the new hold down to see if that was it for sure.
Good idea Jesse.
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1971 LWB Custom, 6.0LS & 4L80E, Speedhut.com GPS speedometer & gauges with A/C. 20" Boss 338's Grey wheels 4 wheel disc brakes. My Driver
Seeing the USA in a 71


Upstate SC GM Truck Club
2013,14 and 2016 Hot Rod Pour Tour


http://upstategmtrucks.com/



Get out and drive the truck this summer and have some fun!
It sucks not being able to hear!

LWB trucks rule, if you don't think so measure your SWB!
After talking to tech support at Air Lift I have found out that the kit I need is 60811. Per the measurements I gave them. Ride height of truck inside spring and inside diameter of springs.
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Old 06-06-2020, 09:32 AM   #9
72c20customcamper
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Re: Stock 350

Had a 292 that was doing the same thing untill it finally wouldn't run well at all. Ended up being the gear on the distributor was moving .
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Old 06-06-2020, 11:23 AM   #10
lolife99
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Re: Stock 350

Use a stud and nut instead of a hold down bolt.
The stud will fully engage the threads of the aluminum intake and prevent stripping the threads.
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Convert to disc brakes.
http://67-72chevytrucks.com/vboard/s...d.php?t=444823
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