The only time I use seat loads that high for hyd rollers is when they’re being used with higher end lifters specifically designed for those operating conditions.
I wouldn’t put the std Comp hyd rollers in that category.
If you’re using Comp regular steel retainers, the tool steel or Ti retainers will add some height(.030 +/-).
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads