Stockish 340 upgrades, cam needed

No, afraid the 5767 springs are a lot lighter than what Howard's recommends and the Edelbrock 9736 retainers are a little loose, too. Here's the springs for the howards .904 specific cams. There is a PAC single spring that can be shimmed to 1.77 installed height for the same pressure with the proper shims for about half the price, though. Here’s the Howard’s springs.
Howards Cams Performance Mechanical Flat Tappet Valve Springs 98438