[ROVERNET - UK]105S (was Speaking of P5's)

[Paul Smith]

So the question I always ponder is; should I find another block and have it 
rebuilt at my leisure so that I can switch it out when I need to and save 
down time, or do I wait for the current one to expire and put my toy up on 
blocks until the engine is finished?

Do the former!  Always better to rebuild at your leisure, and P4 blocks are
Heavy.

PVS