Hi guys, new member here. I've been looking here for some time and now could use some help. What speakers are available for a stock am/fm for a 69? It's a bb vert with side pipes, so I'm not expecting much, but would like to get the best that would work with what I've got. It looks like 4"x6" will fit in the kick panels. What about ohm ratings? 4,8,10 ohm? Thanks in advance.