i am converting my 66 dart from the 9 inch drums to lbp disk brakes . I am stumped on the brake caliper hoses . Do i use 73-76 brake hoses? Are they going to be long enough?
Thank you for your help

If you're using '73-'76 A-body slider calipers mounted to the front, hoses for the same should work.
If you mount the calipers to the rear, try Volare/Aspen hoses and be careful about the bleed screw location and hose orientation/clearance. You'll need to slightly modify the hose bracket to fit the hose block.
Here are some photos from my '64 Valiant. 205-60R15's on 15X7 rims fit with 13mm offset.

Volare Calipers and hoses:


Hose End:


Bracket:

_________________
"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO

I mounted my calipers in the rear and used Aspen / Volare brake hoses.

_________________
"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair

I went with front mount and used the 73-76 hoses on our 71 swinger just to keep it simple. I shipped all the parts and had to finish the work inside of a week away from home and we drove the car from northern Washington to southern California with a side trip to Yosemite. I would have preferred a rear mount as well. I am going to be using an addco sway bar and will find out what kind of hassle that may be soon. I have thought a little bit about putting holes in the k-member and using the 73-76 style sway bay, but it would be easier to just get new hoses and calipers and swap to rear mount. I hope it does not come to this.