You may want to read these articles. The first describes the oiling isssues from feuling's perspective and the second from our personal experience.
I will not run a TC88 without a Feuling pump or an accurate gauge.
https://www.directparts.com/static/a.../superpump.htm https://www.directparts.com/static/articles/twincam.htm
The Delkron plates are beefy and strong and will not flex like the cast plate can. Is an absolute must? Nope. If it is in the budget it is good insurance. I run it because both OE cam plates I had in my shop when the problem happened have the oil pressure relief port blocked and capped off.