To Much Cam?

What company made your convertor???
Sounds like it's a little tight.(lower stall then it sould be)
The carbs pump shots are too lean or too rich.
If the car falls on it's face it's too rich.
If the car stutters and then die's it's to lean.
What size pump nozzles do you have front\rear
and whats your total timing at?
It's not making the power it sould, so the stall speed on the convertor won't be what it sould also.
If you never changed the power valve then thats part of the problem too.
try this:
Put in a 3.5 power valve
front pump shot 35
rear pump shot 40
red cams for pumps
69 front jet
78 rear jet
36 total timing
four hole spacer \\ one inch if you have hood clearance 1/2 inch if you do not
3924 autolite plug or a plug of the same heat range
LET ME KNOW WHAT YOU HAVE NOW FOR ALL THESE.
WITH NO GEAR IT WILL BE VERY TEMPERAMENTAL.