66 hipo dart info

Ok im ONLY 31 and im very prone to these cars as well. im not no expert but i do know the KH brakes were a 65+ option, being the only difference is the 4' pattern vrs 4' 1/2. then they went single piston. The only early cars i have seen with a 8 3/4 are 4 spd cars, one 65 for s hipo car " barracuda" it had 10'' front drums.. lol the other was a 66 dart gt 273 2bbl auto but, the dude told me directly his father worked for chrysler, and had installed the 8 3/4. I have seen 1 other 65 dart convert with a 8 3/4, but again i think this was a later added option. I do think SOME of the early hipo cars came from factory with 8 3/4 but only with 4 spd, but it was not mandatory. It could be ordered anyway.