Hey guys so my motor has been rebuilt before and currently has around 70k on the rebuilt motor, it still feels very strong and doesn't smoke but I was wondering if I should rebuild it again before going single turbo. Would a compression test be the first thing to do even though the engine feels good? Anyways, thanks in advance!

 

Yes I definitely recommend rebuilding before further modifying the car and adding further stress. At the very least I would do a compression test. Also, I would consider what seals and other parts were used in the past rebuild.