I recently purchased a new t3/t4 turbo my my mr2

. I plan on making a custom turbo kit with a little help of the ebay parts and some welding. I got it mostly planned out but I have 2 questions

. I dont know the correct terminology but there is a hole on the exhaust side for the internal wastegate but I will be using and external. Will that be a problem?

..... The next question is what to do with water hoses that cool the turbo. The new turbo doesnt have the "water jackets" that our normal ct26 has. I no there wont be a problem with the new turbo cuz ill jus schedule more frequent oil changes but the problem is what should i do with the water lines after i got the new turbo in?

I no its not a big deal I jus need some ideas thrown at me cuz i would like to get this project started.