SVO 73mm Piston Calipers

Been there. I have gotten rid of the car now, so I don't still have the paperwork, but the pads that fit are in the parts suppliers' system as for a Corvette. I forget the year, but I think they're for a 1970. I know it doesn't make sense, but that's what fit... Once you get the right ones, ask AutoZone or Pep Boys or whoever to print you a 'pull slip'. That will have the part number for the next time you need 'em.

On my 73mm calipers I used Hawk HP+ (not HP-S)

Pn HB125N.650 D199/D200/D499

Well I tried to get the HB125F.650 at PepBoys because they carry Hawk pads and they should be the same size as the HB125N.650 and when I brought my caliper in they did not fit. Also, I went to AutoZone to see the calipers they carried for the SVO and the ones they have look like they have some sort of bracket inside the piston that is plastic or something that makes the smaller clips on the pads fit. Is there supposed to be one of those on my caliper??? What gives here???

Well I tried to get the HB125F.650 at PepBoys because they carry Hawk pads and they should be the same size as the HB125N.650 and when I brought my caliper in they did not fit. Also, I went to AutoZone to see the calipers they carried for the SVO and the ones they have look like they have some sort of bracket inside the piston that is plastic or something that makes the smaller clips on the pads fit. Is there supposed to be one of those on my caliper??? What gives here???

I have been on the phone with 50Resto.com for a half an hour and they can't seem to figure out why the pads I got don't fit. The calipers I have are justa steel piston that has a small rubber piece going around the edge and there is nothing else there it is just steel. These guys are telling me that they sent me the right pads and I am telling them that when I put the clip into the piston it DOES NOT FIT it just rattles around in there like it is meant for a 60mm caliper (the stock GT one). I have no idea what to do besides return the caliper and get them from damn auto zone!!! AHHHHH this is so frustrating!!!

I have been on the phone with 50Resto.com for a half an hour and they can't seem to figure out why the pads I got don't fit. The calipers I have are justa steel piston that has a small rubber piece going around the edge and there is nothing else there it is just steel. These guys are telling me that they sent me the right pads and I am telling them that when I put the clip into the piston it DOES NOT FIT it just rattles around in there like it is meant for a 60mm caliper (the stock GT one). I have no idea what to do besides return the caliper and get them from damn auto zone!!! AHHHHH this is so frustrating!!!

I have been on the phone with 50Resto.com for a half an hour and they can't seem to figure out why the pads I got don't fit. The calipers I have are justa steel piston that has a small rubber piece going around the edge and there is nothing else there it is just steel. These guys are telling me that they sent me the right pads and I am telling them that when I put the clip into the piston it DOES NOT FIT it just rattles around in there like it is meant for a 60mm caliper (the stock GT one). I have no idea what to do besides return the caliper and get them from damn auto zone!!! AHHHHH this is so frustrating!!!

I have been on the phone with 50Resto.com for a half an hour and they can't seem to figure out why the pads I got don't fit. The calipers I have are justa steel piston that has a small rubber piece going around the edge and there is nothing else there it is just steel. These guys are telling me that they sent me the right pads and I am telling them that when I put the clip into the piston it DOES NOT FIT it just rattles around in there like it is meant for a 60mm caliper (the stock GT one). I have no idea what to do besides return the caliper and get them from damn auto zone!!! AHHHHH this is so frustrating!!!

I think I have found your problem. I happen to have a set of stock 73mm calipers in my basement.

I measured the inside of the pistons to be about 64mm ID. But, there's also a metal donut welded inside the caliper. The hole in that is about 40mm. The clips on the back of the pads fit inside that 40mm hole.

My guess is that instead of making differant pads for the SVO calipers, Ford welded in that donut so they could use standard Mustang pads. If you don't have that donut with the smaller hole, then you'll never get a pad to fit right.

AH-HA!!! I knew I was missing some part of the caliper!! So I guess I should just return the calipers I bought from 50Resto.com (who I am very disappointed in for their lack of info on parts that they sell) I even told the guy to get out an SVO caliper and check to see if the pads fit the one he had and he tried to tell me that they did not have the brake pads in stock to check it...BULL. I am really surprised too because I have had good experience with them in the past but it seems like they don't know much about this particular caliper...I really appreciate the help boB thanks for checking it out for me!!

SEAN

So I call the guys at 50resto and they are trying to tell me that I have to bend the clip on the pads so that it will fit the piston in the caliper. Is that possible??? They tell me it was the resident Ford "expert" that told them that....they also mentioned that if I want to return them they have to look "exactly like they did when I received them or they will send them back to me! Is that ridiculous or what???

Yes, that's pretty absurd on both counts. They sold you the wrong parts. They should take them back with no questions asked.

try part numbers mkd499 and mkd150