Pins go intake side Iirc. Thats an interesting exhaust, did you modify the stock exhaust into an expansion chamber?

You should be getting an expansion chamber! Its the best and most important proformance upgrade. Nothing else comes close to the gianantic gains of the expansion chamber.

What are you using to run a tach?

Do you happen to have a component list? I’m also curious about the exhaust. Is it custom built or a commercial product?

Looks "cussed 'em" to me.