I dont know which ports are secondry so is it as easy as this, Open the 3 throttle butterflys the first to open is primery then two open together they are secondrys.
Then Follow the secondrys back to the plates and thats your Bridge ones. Does that sound right

Im i right in saying the secondry ports are only used with the secondry Injectors etc? So on tick over there will be no fuel air coming from the bridge.

Next is the size of the ports, Does any one have a diagram of a big street port dimentions and possably even Bridge?

Thanks for your help