Pre bent line or do it myself?

Depends on your desired end state, skill level and available tools. The Nicopp stuff is easy to bend but you end not to get real crisp bend like you do with steel. I just bent some for the front of a 69 ply wagon and used Nicopp bc the engine was was still in and it was easier to use Nicopp to get it in and make small adjustments to get it to fit nicely.