700r4 trans lockup question

[eight8v45]

I have a 1989 Chevy 2500 six lug that originally had a five speed and was switched out with a 700r4 just would like to figure out how I can get the trans to lockup without dropping the pan and using an after market kit just want to use the original solenoids and switches inside the trans by using vacuum switch to control activation and a brake switch to cancel when brakes are applied

[NEUMANNZZ]

get an 89 truck th700r4 trans wire harness/brake switch harness and prom, otherwise get a lockup kit.