prepping magnum

Hey 72bluNblu, good meeting you today. I have a crosswind intake, still need to get a holley carb (trying to figure out how many CMFs I want) and a cam (trying to figure out what cam to go with)

Anyway. Timing chain is a good idea. What about oil seals? Are they known for going bad? May even get a valve job.

Also trying to decide between v belts and serpentine belts. So many decisions. But I want a street car first and foremost.

So what's a good double roller chain brand that I should look into?

Thanks
Hillbillybuddha