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What would cause a stock convertor to put to much load on the engine

Regardless of where I am for initial timing I cannot get my idle mixture screws to work even when I'm at my highest rpm by adjusting the distributor.

also at 36 initial I'm bucking the starter. If I set it around 900rpm for idle it drops to 600rpm in drive

I have tested everything you ask. I just now set the initial timing to 36 like you asked but I still can adjust the mixture screws

car starts and runs perfect at neutral, very responsive to throttle, -revs up good at neutral - does start cold perfetly when put in gear.... - when hitting the gas pedal too fast it stalls out - when hitting gas pedal slowly it drives okay - while driving you can floor it and it won´t stall...

Could I possibly have to much fuel pressure im not running a regulator, but I only have a mechanical fuel pump. Another problem I have is if I step on it from a stop it dies when I let off. If I ease in it won't die. If I'm in park I can give it throttle no problem seems pretty snappy. Not sure...

If i get to the point where I feel like I may need to drill the holes, and I have an extra carb for parts whats size holes in which throttle plate would you suggest

i did i am at 15 initial and 36 total still having the same issue.

I'm at 15 intial now and 36 total, but mixture screws still aren't working properly. The idle actually increase when screws are fully seated. Is 750 cfm too big for a 400 and should VA be hooked up to ported or manifold? It seems to run better on manifold.

Yes idle rpm increased up to 36 and with ran smoother and seemed like the throttle response was smoother. So how much is too much total timing. Seems like most post I see people are looking to achieve roughly 20 initial and and any thing over 38 total is to high. Is that not correct?

Some details about the car I should have mentioned its been converted to electronic ignition. It has a lunati cam grind VDBCR-258. Keith black 240.040 pistons, been bored .040 over. It has edelbrock 75 cc e street heads and an edelbrock 1407 carb with manual choke.

It is like 36 still doesn't buck the starter but that seems really high

I had it at 10 on initial

What should total timing be with vacuum advanced hooked up? Somewhere I read 50-55 is that correct?

based of of summits compression calculator i should be closer to 9.5:1

Yeah It was closer to 090

Well between the distributor and the ignition module it solved it. Thanks guys! but now I have an issue with the carb the idle mixture screws still don't function properly and if i put it in drive and step on it, it dies when I let off the gas, but only when from a stop. in park I can give it as...

I don't believe so I check several times but I check once more when I put plugs back in

The coloring on 5 and 6 is about the same im not sure if 5 isn't firing either. This is the same way the old engine ran with a different set of plugs. But the old engine had other issues too due to bad experience with a bad engine builder. Needless to say I wound up rebuilding this one myself.

That is exactly what I'm going though 2nd motor on this one but never replaced ecu or dizzy so I figured it doesn't hurt to replace them as well