i think you could use a 69 vette rotor and just redrill the bolt pattern. the rotor height is 3.08" which should work just fine on the outside of a drum rotor but i don't have a drum hub to figure the height with a rotor installed on it. anyway here are the rotor specs from Napa
Rotor - Front - Premium
Click on image to see enlarged view
Bottom Side Top
Item#: NB 4885748
Price: $34.99
tax and shipping not included
Disclaimer: The stated price may vary from the in store price and may change at anytime.
Attributes:
Features & Benefits:Manufactured with Original Equipment Vane Configuration.
Features & Benefits - 9:Yes
Bolt Circle Diameter:4.75"
Outside Diameter:1.245"
Discard Thickness:1.215"
Thickness When New
Height:3.08"
Vented / Solid:11.75"
Drilled / Slotted:Vented
I agree that such a multi piece bracket is not the most elegant solution. Actually, from an engineering point of view, no bracket at all and the mounting holes integrated in the caliper is best.
Wouldn't it be better to buy a modern system that is engineered for the car? I had that conversion on my 1970 BOSS-320 back in 74 and while it worked very well it also weighed a ton! New systems with aluminum componets work better and save pounds of unsprung weight. Plus you don't have to spen hours at a parts store and junk yard getting all that stuff.
the problem is he doesn't want a sliding caliper, he wants a fixed 4 piston caliper and there aren't a lot of affordable aluminum 4 piston fixed calipers available nowadays. i did find out that the hummer h3 has an aluminun 4 piston fixed caliper that might work and the ones i've found on ebay have been really cheap, the only problem is that i don't know how wide of a rotor it is designed for. i need to do some more investigating to see if it will work with the galaxie 12" rotor or if it uses a narrower rotor like a stock stang does.
they do have an aluminun 4 piston caliper that is bigger than the 65-67 k/h version. i don't know if it's an aluminum copy of the lincoln/t-bird caliper or a vette caliper, it's pretty damn pricey itself however.
http://stainlesssteelbrakes.com/products/detail/5031/?make=Ford&model=Mustang&year=1969
this is for a complete brake kit but these are the calipers i'm talking about.
How did you manage to fit a SN95 hub on an early spindle? The SN95 spindle pins look totally different. Just curious.
As for installing ABS, I've no experience with this, but wouldn't be better to to use the brakes from the same car the ABS unit came off (like Mustang Cobra brakes with a Cobra ABS unit)? ABS calibration may be totally off otherwise. Just something to consider.
as long as the piston area is about the same or within a few percent it shouldn't matter what brakes you use. i haven't tried to do the calculations for the t-bird caliper but it should be close enough to work ok.
most ABS brains are programmed for front to rear brake bias, vehicle weight balance and brake system pressure. you can make one from a similar weighted car with similar brakes but if you go very far away from the original application it's probably not going to work right.