Transit power

Basically it's thicker walled like the 200 block.
It also does not have big core plug the back of the block which can cause 200 blocks to split lengthways.

The only downside is the fact it can't be longstudded which was never an issue for me as I don't like longstudding.
An alloy head needs room to expand.

Basically it's a vast improvement on the 205 block and swings and roundabout compared to the 200 block.

I went that route following advice from my engine builder and wouldn't hesitate to use 202 blocks in any power build