The 1953 F100 was a pretty good change from the older F1 pickups. There were a lot of changes including the bell housing.
On the front supports, the upper was a TAAA-6038-A originally in 53 but the replacement was similar or same for the Thunderbirds so a new part number was issued B5S-6038-A. The lower remained as part number TAAA-6039-A. All are still available depending on where you look.
The rear support is a part number TAAA-6068-A that fits the bell housing. There were also used on other years so they are still available as well.
These are all for V8 applications. There are some differences with the 6-banger.