Wonder if someone knows or has experience of the Dual Engine Tagan in combination with an Antec P182 case?

I'm looking to get a new Case to replace my creaking 6 year old Dragon but have heard that my PSU may not have long enough cables?

Is it just a question of extending the main power lead (the 20/24 pin header) and / or will I need other power extensions - or indeed will the PSU be okay as-is?