what do i need to do the conversion on my 70 chevelle? i thought about tall spindles but not gonna go that route.i want the parts to be OE so that i dont have to take a list of year models in the parts store to get all the right parts. i plan on buying new rotors,calipers,bearings,and hoses. so i'm assuming all i need are disc spindles with all the necessary brackets and backing plates. any replies will be greatly appreciated. thanks in advance,Timmy

timmy, there is a veritable encyclopedia of disc brake swap info on this site, do a search with disc brake swap as your search words. Good luck, you should find everything you need to know and somethings you probably don't want to know. :D

At the bottom of the forum page, there's a "disc conversion archive"

hey, I'm in the process of doing my 70 right now, I went the route your thinking of. You'll need the spindles, backing plates and caliper brackets. Everything else you can get from your local auto parts store. I got a used set of spindles for a 70, the were $70 apiece, not sure of the quality of the aftermarket ones for$99. The caliper brackets were the most at $120, brand new cadnium plated. And the backing plates were $55 brand new,this came with all the nuts and bolts too. Got it all from Camaro specialties, they have a web-site. They have a bunch of options they have but i wanted everything new. ill give you a breakdown of what you'll need and cost!!!
(these are for both sides)
spindles,brackets,backing plates $315
wheel bearings and seals $50?pretty close
new rotors $120
loaded calipers,cause youll-
need the guide pins $50
new master cylinder(for disks) $25
new brake hoses $35

now about the combination valve thing!!
if its like mine, I had Power drums with a distribution block on the frame. To go to disks you'll have to either get a metering valve that goes under the master cylinder and also reuse the distribution block on the frame like a 70 came with disks. Then you'll need new brake lines. So to beat all this I went with a 71 setup, where they went away with the metering valve and distribution setup, to a one-piece combination valve that still goes on the frame. The piece is $54 from gmpartsdirect.com .So I bought this valve for a 71 got a booster and master cylinder
for a 71 cause mine were shot for $95. A 70 setup is $130. Also I wanted new Stainless lines for mine, so I got ones for a 71 cause the'll bolt right up with no problems they are pre bent with the gravel guard and everything real nice for $175 complete front to back.They were from classic tubing, they have a web site. (does not include the 3 rubber lines)
Lines for a 70 are $200 cause theyll have to custom bend them to their style combo valve. and their valve is $100 so you'll save alot to go with the 71 setup if you dont care for it being stock.I might have forgotten some things but you can see the total is still under the price for those conversion kits, and you dont even get the full brake line set. And I can run right to my parts store if any problems. any more help with the small details let me know my e-mail is jerandjul@hotmail.com.some people might have better options or live were there are alot of used parts, but up north were road salt is king you lucky to find a used tire in a boneyard from a 70. I'm a rookie and this was the easiest for me!!! hope this helps