Ammeter to Voltmeter conversion

I am getting my parts and peices to do the madelectrial bypass of the ammeter that someone had posted here. Taking awhile to get some bits and peices, I get strange looks when I ask for 8ga ring terminals.

I e-mailed redline gauge works about converting my ammeter in the rallye cluster to a voltmeter they said it is possible and will take a week @ $135. Has anyone ever had this done?

I'm wondering the same and found this thread first.

Can anyone point me to the thread referred to above?

Thanks