JB weld, flex seal or full rebuild ?

Yep.
Springs, switch to 10 degree locks n retainers if solid roller. Price accordingly..180-300
Cam-300ish bucks
Roller lifters 300-1,000+
Crane coated steel gear for billet core 90.00

It can add up. I went through herbert cams and got a nice setup for less.

The Herbert stuff looks really good on paper but they scare me. I went through THREE hydraulic flat tappets from them a few years ago and not one of them measured to the specs on the cam card. Not even close. Each one they took back, inspected and agreed with me. The third return, I asked for a refund. It was not a small difference, either.