Knucks likes Expo's outline.
Given that the Chulos are cruising then, as opposed to parked and just revving their engines, we'll have to flag them down somehow.
As for the conversation, Knucks knows that he's not the honey-tongued social type, especially when dealing with puny humans. He's fine letting Expo take the lead, although Knucks might not be above texting/subvocalizing tips and tricks for ganger etiquette.
Step 1: Feel out the Chulos to see if they might receptive of a mutually beneficial arrangement
Step 2A: If so, head up the hill and repeat the process with the Technoids
Step 2B: If not, either convince them to roll up the hill early
If the Chulos demand a turf tax, maybe we can pay in drugs or something that will get them irrational and excitable. Knucks is willing to contribute his stash to the cause.
If Expo is particularly convincing, maybe he can even get the Chulos to hire us as backup. Uffington, in particular, should be a valuable asset for the street ganger on the rise.