[paul robert]

We've always had what we called hybrid cars in the family, european cars with US engines, not always Chrysler but a few. A Facel Vega (383), a Monteverdi 375L
(440) and I still have my father's 1975 Interceptor (440).
They all suffered (as did the Bristol) from hot starting issues. All cars had at some point had their intake manifolds changed to aluminium ones which made the issue worse. If the car had a Holley carb the problem was less pronounced. Aluminium is a good heat conductor so no wonder the carburettor gets a lot more heat after switching off. The holley's fuel chambers are further out from the centre of the intake manifold and get a bit less heat than a Carter/Edelbrock. The problem (and the solution) are somewhere else and very easy to fix.
The Chrysler big blocks cylinder heads have so called heat crossover ports in the centre with a channel running through the intake manufold under the carburettor from one side of the engine to the other conducting hot air across.
This is to warm up the carburettor in cold weather. In hot weather after shutting down the engine, it will easily boil the fuel in the chambers resulting in vapour lock and ridiculously long starting times. All the above cars had it and it was solved by exchanging the valleypan gasket with one that has blocked heat crossover passages, easily available at places like Summit.
I then usually cover the valley pan and the underside of the intake manifold with insulation material. Oh and if the car does not yet have an electric fuel pump install one while you're at it.
Probably preaching to the converted here but when I mentioned this to a well known Jensen specialist it was news to him and he immediately ordered a bunch of gaskets. So hope this of some help