Wireing my engine start-up stand

How much "stuff" you going to run? tach?

What exact switches (photos and or links?) and what do you have for a starter switch, IE key, push button, HEAVY push button? This is going to "decide" whether you need a starter relay

What type of ignition?

Would be wise to buy yourself 2-3 inline fuse holders

I assume you will not be running a charging system.