1972 K20 front brake line Tee question
 

My 72 K20 has a 1969 frame. When I replaced the front axle with a disc brake (1977) axle and Inline s/s pre bent brake lines, I realized the front brake line tee is different from the old drum brake tee.
I called In Line, they have tee's, but I'm not sure what to ask for. They want measurements.
Does anybody know of a source that would know what I need to ask for?
Thanks