Newer cast blocks made for motor adaptor plates

[Hydros]

here is a cast block, note there is no way to mount the motor and bearing. This type appears to be a third generation cast block.

[Hydros]

here is the older style with the newer. The right side requires the adapter plate

[Hydros]

interesting to note, these are the same on the gear side, note the complete flat surface, not even an indent for the pump seal. This is because of the seal on the pump head. Also note the 9 spline pump shaft.

[Hydros]

This is an example of the required different pump heads.

[Hydros]

Note one block has 2 ports on top and the other has three. We will go into this later.  The two port only needs to be drilled straight down to the ports inside the tank. The three ports require original fittings.