I have run a McLeod cintered iron adjustable clutch on the street. Cintered iron disc is necessary for an adjustable clutch due to heat. Its miserable, its noisy and harsh. Have you ever had squeeling brakes? Sounds just like it. Its doable but its not fun. Plus those clutches are expensive to reface.
Pettybluedart, Nice pass man. Its hard to run a stick car at the track, looks like your doing good with it.