Hot Running/Starting Issues

[andig]

Hi all,

Firstly, after 5 years of being cobra-less and increasingly feeling the need to have one in my garage, I took the plunge and recently purchased a CSX6000 series car. The car looks to have been beautifully put together with the 468FE/Holley carb installation been done by V”Superformance sometime in 2016. Since then the car has done less than 1000 miles.

So here is my issue that I would be grateful for some advice on so I can run the problem to ground:
When the car is cold to reasonably warm it runs perfectly - very responsive throughout the rev range, idles nicely and restarts easily. However, I took it for an extended run yesterday and when the car got hot after about 30 mins of driving, the engine started to stutter and stall and left me stranded at the side of the road. The engine would restart after a lot of cranking (starter and battery are both strong) but would die again almost immediately I started driving with black smoke coming out of the side pipes. I then let the car cool for about an hour and it immediately started and ran perfectly for the 2 mile drive back to my home.

Does this sound like an ignition problem? The car has an MSD distributor and coil with an MSD Streetfire 5520 ignition box mounted under the dash of the passenger side.

Any and all advice gratefully received - thanks.