New Clutch Slipping

[Vern A]

I just replaced the clutch disc, pressure plate and throw out bearing on my 1932 Ford pick up and it still slips at higher speeds when accelerating. I'm running a stock 1940 Flathead and a Borg Warner T5 five speed. The adapter came from Speedway Motors. I've tried adjusting the clutch but it doesn't help. Everything is dry. I've worked on and built a lot of cars over the years but this kind of has me stumped. If anyone has any ideas I'd really appreciate it.