[Geoff Kingston]

Kevin,
I realised it was both hence the two replies, I think you are right about the fuel pressure as well, on my 411 it was poor with the manual pump so we converted to electric and eventually a new Carb with a manual choke, now starts no problem hot or cold. On my 603E the carb was damaged so was replaced and an overhaul kit obtained to rebuild the old one at a later date.
The engine still had the block mounted pump but the previous owner had fitted an extra small electric pump to aid starting. We replaced the lot with an electric Facet pump with an in line fuel pressure regulator and have had no problems since.
Hot starting was a issue I suffered on an R Type Bentley we found that the spark was too weak to ignite the fuel when the engine had stood for a few minutes, having gone through everything with little improvement on the standard set up, the general forum advice was to fit electronic ignition.
The system I chose was Fred Winterburn's capacitor discharge unit which cured the problem completely and made the engine run a lot better on modern fuel.
Edlebrock do heat insulating spacers for various manifold and carb set ups and according to some postings on a Chevrolet forum have cured the hot start issue for some owners.
Geoff.