I have a question about the ignition of my Ford 1954 Customline in 6v with positive ground, I will like to go to 12v and so always in positive ground, I found 2 kit Pertronix and I would like to have your opinion because the special Yblock Is for the negative ground .. of the blow I do not think it is good ?!

Pertronix 912820 for Yblock Ford but i think negative ground ! and 

 

Pertronix 1183P12 Pertronix Ignitor Kit Delco 8-Cylinder 12V Positive Ground !! thank you very much  team