i have a 1988 n/a 13b i wanted to know what rotary is the best to use for PERIPHERAL PORT or a J-PORT im kinda sure u can not J-PORT a 6 port rotary right?

 

You can't do jack with a 6 port side housing unless you are plugging it and making a p port. People will argue about this though because that's just the way it goes.

 

so what would be the best rotoary to get a 12a or a 13b 4 port

 

A 12a is not the way to go. But all this depends on what you are wanting it for and how much you are willing to spend.

 

I will spend as much as i have to spend. So what motor do u feel would be the best to build up? I think im going to go with a PP engine. Can u still boost a PP engine? im sure there has been post about this but the search is down or somthing thanks for your help