Flat cam lobe, what cam now

Well after only about 100 miles #6 exhaust lobe is gone on my .590 cam.
Car ran fine but decided to pull the valve covers to adjust lash and found the lash cap laying in the head, so I got it back in and adjusted all the valves and sure enough that rocker barley lifts the valve. Break in went fine, used brad penn break in oil and ran at 2500 for 20 min, guess s*** happens. so I'm going to get another solid flat tappet but not sure what to get, the .590 was the absolute biggest I could go due to seal/retainer clearance. I had the .590 in at 102 and it still seemed I little soft down low.
Engine is
.030 over 383 11:1
Arias dome pistons
Stock rods with arp bolts, steel crank
2.08 1.74 valve 516 heads with bowls cleaned up
Street dominator intake with 750 mighty demon
My converter that was supposed to be about 4200 stall turned out to only flash to about 32-3500
8 3/4 with 4.56 gears and spool
255/60 MT drag radials.