I need some input on a 1000hp 727 trans

I have a 1976 727 core and want to know is the 1976 core good one to start with to build up all the other tranny's I have are a 1968 - 69 and a 70

The 76 is the only stock core I have all the other one's or built and working tranny's


I am not going to use the trans brake part of the valve body just going to foot brake the car , it's 99% street use and mostly going to the cruz nite's with the wife and will be 5 to 8 psi of boost so it may make 600+ on the street and if I go to the track I will foot brake it I'm not into the racing just go to time trials for fun to see how fast it will go .

I'm a grandpa on the street meaning I do the speed limit or less I need my lic. for work no lic. no toy's lol