ARH for me. I've actually used both, and the ARH kits are better quality springs and cock easier since they leave room for a larger OD spring without having the second external guide.

The Vortek kits tend to be a little higher powered and harsher shooting. The ARH kits are more on the conservative side of things. 

Especially since you are using the 80s era HW77, which has the smaller 25mm piston, I'd want to stay on the conservative side for power and the ARH kit will be just right for that. 


 
Thank you for the replies, appreciate your recommendations now I need to decide what kit. Currently waiting on a very nice gentleman to decide when he wants to ship it, blueing is a little rough and the ball and spring are missing from the cocking lever. There are some older post concerning this matter but I’m always happy to learn more about this fix. You members are such a big help answering questions.