Alot! With a .557 sft in my last 340 with w-2 heads, i had actual .532 lift at the valve retainer. So the 59* lifter angle doesnt help
Wow! Some serious losses there!
Adjust your rocker geometry! Get some back.
THE trick that Bob Glidden did to make that 79 Arrow fly in pro stock. Welded up the lifter holes then drill new ones to line up straight up to rocker, Chrysler made one of the new R blocks the same. Hemi has the same problem, only B-RB engines are correct. The block was designed for the poly head and Chrysler didn’t want to tool up another block to make the LA heads work right.Wow! Some serious losses there!
Adjust your rocker geometry! Get some back.