I think trans Dapt has probably taken some of his A body business.

https://www.jegs.com/i/Trans-Dapt/969/4697/10002/-1
https://www.jegs.com/i/Trans-Dapt/969/4695/10002/-1

Holley and others have taken some of his Gen 3 business.

Don't know if it is true, but have read rumors he may have been associated with Imperial services in Frankenmuth...if true
that may have been related to delivery issues as they aren't know for being a lightning speed
high volume kind of a supplier.