You've got a couple of great looking trucks! The 1956 Chevy would be classified as a 10000 series here in the US, that is the heaviest model Chevrolet made in the 50's. 1956 was the first year for this series, almost all of them are long gone. The few remaining that I have seen are almost always rotten with rust. Looks like yours is quite clean and original.
If possible it would be great to have some more pics of your trucks from all angles, engine compartment, interior shots, etc... also how they were acquired and history of them. They would be great in the Stovebolts Gallery with a full write-up.
Its great to have you onboard!!! James