Scottie - Looks like there is lots of great progress going on with your build.
Your rev. counter solution is a serious piece of work.
As part of my education can I ask another daft question...
When your fan is placed in front of the radiator is it blowing air through it?
I've seen others fit the fan behind the radiator and I assume they are "sucking" the air though.
Is it really just a case of "six of one and half a dozen of the other" and it makes no difference?
Cheers, Paul.