escort GT racing/daily driver?

well im wanting to get a escort GT for daily driving but be able to go to the track and be legal to race there so i need a roll cage and harneses so i wan to know whats a good racing seat and harneses that will be good for racign but beable to be sat in for long drives also what should i do for a roll cage? how should i set up the bars across the doors so that i can still get out easily?