New member with Starter problems

[Boise69]

Hello All,

I'm new to the forum so please forgive me if i'm doing this wrong.

I own a 1969 C-10 SB 350ci Auto. I've been driving it daily for 3 years and well a month ago it stopped cranking... turn the key and just the brake light ignites and a faint click.

I replaced the battery with an optima... faint click.
I replaced the the positive cable terminal .... faint click
I replaced the OEM starter with a new Mini ... faint click
I spliced in a new 12GA wire for large purple wire leading to the starter becasue it looked old and dry .... faint click
I spliced in a new wire for the yellow insulated wire leading to the starter ... faint click

I have an ACCEL HEI. I replaced the cap, the coil and put a new wire that leads to the firewall... faint click.

Now i'm tempted to replace the entire wire harness and ign switch.

Any suggestions? Whats the best way to see if the NEW starter is working?

Thank you'

Ted