440 Timing issue?

[JPL]

Hi all, I have a '71 Charger with a 440, .30 over, 906 heads, 268/454 comp cam, Holley 750 vac sec, electric fuel pump, 2800 stall converter, 4:30 gears. The issue is, when the car is warmed up, in gear, from idle, I push the gas pedal down about half way real quick and lift, the car will launch forward nicely, then it stalls. I can't time it with a timing gun because the tab on the timing cover is way off for some reason, I think it's from another motor during the rebuild. So, do you guys think this is a timing issue? If so, should it be advanced or retarted?
Thanks!

[70 sublime]

Does it have vacuum advance on distributor ?

[JPL]

Does it have vacuum advance on distributor ?

Yes, MP electronic ignition.

[cdr]

you need to get the timing mark correct !!!!!

[INTMD8]

you need to get the timing mark correct !!!!!

Yes agreed.  "should it be advanced or retarded from unknown position" = 

Best would be use a piston stop, one way mark dampener, other way mark dampener, halfway inbetween is your TDC.

Could ballpark it with a straight piece of wire/coat hanger through the spark plug hole (and draw gradient lines on it with a marker so you can see relative movement)

[JPL]

you need to get the timing mark correct !!!!!

Yes agreed.  "should it be advanced or retarded from unknown position" = 

Best would be use a piston stop, one way mark dampener, other way mark dampener, halfway inbetween is your TDC.

Could ballpark it with a straight piece of wire/coat hanger through the spark plug hole (and draw gradient lines on it with a marker so you can see relative movement)

The question isn't "should it be advanced or retarded from unknown position"
The question is "when the car is warmed up, in gear, from idle, I push the gas pedal down about half way real quick and lift, the car will launch forward nicely, then it stalls...... So, do you guys think this is a timing issue? If so, should it be advanced or retarted?"
The cars runs great and it pulls strong, the stall after a throttle blip is the only issue.

[INTMD8]

^ If you don't know what the timing is, that is exactly the question.   

[JPL]

Just want to know, if the car is stalling in that situation, are the chances more likely that the timing needs to be advanced or retarted..........

[INTMD8]

No one could possibly have an idea.  It needs to be done correctly. May have nothing to do with timing but step one is correct the timing mark and actually set the timing.

[JPL]

No one could possibly have an idea.  It needs to be done correctly. May have nothing to do with timing but step one is correct the timing mark and actually set the timing.

4 experts/mechanics have an idea, they all said timing but 2 said advance and two said retard, lol. It runs great, (through power timing), except for that issue and with out proper timing marks I didn't want to screw it up further, so just was looking for opinion/direction.

[INTMD8]

No one could possibly have an idea.  It needs to be done correctly. May have nothing to do with timing but step one is correct the timing mark and actually set the timing.

4 experts/mechanics have an idea, they all said timing but 2 said advance and two said retard, lol. It runs great, (through power timing), except for that issue and with out proper timing marks I didn't want to screw it up further, so just was looking for opinion/direction.

Ok, do it right.  Or just randomly move the distributor around 

Trying to tune this to run correctly is just a complete waste of time otherwise but good luck with it.

[BSB67]

Wow

[69hemibeep]

I push the gas pedal down about half way real quick and lift, the car will launch forward nicely, then it stalls.

Don't do this 

[AKcharger]

JPL you have to go step by step on this stuff...and step #1 is find where timing is now as detailed above

[b5blue]

Pick one...https://www.google.com/search?client=firefox-b-1-d&q=440+timing+marker   

[metallicareload99]

you need to get the timing mark correct !!!!!

Yes agreed.  "should it be advanced or retarded from unknown position" = 

Best would be use a piston stop, one way mark dampener, other way mark dampener, halfway inbetween is your TDC.

Could ballpark it with a straight piece of wire/coat hanger through the spark plug hole (and draw gradient lines on it with a marker so you can see relative movement)

...I push the gas pedal down about half way real quick and lift, the car will launch forward nicely, then it stalls...... So, do you guys think this is a timing issue? If so, should it be advanced or retarted?"
The cars runs great and it pulls strong, the stall after a throttle blip is the only issue.

Does it stall completely as in engine off? Not trying to pile on, but I don't really see the point of such a "maneuver?" If easing off instead of lifting quickly does it not stall? At any rate, in my nonexpert opinion, this suggests carb tuning is needed if anything   No timing pointer isn't a problem per se, I drove around for years with no pointer, but you'd have to put in some effort tuning it still

[Closet Mooar guy]

Raise idle speed