That disc has been by and will forever be a parts breaker. That disc should only be used in circle track stuff.
Your pressure plate is ok. For what you are doing I’d get a rag disc in it and go.
If you have to you can buy a clutch tamer but you still need to scrap that disc.
If you want an actual, tunable clutch I’d call Rob Youngblood at Advanced Clutches and buy one from him. Expect to pay 2200 bucks or a touch more.
Worth every penny IMO.