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mcmlxix · 09-12-2003, 12:50 PM

I am doing reserach on rear disc brakes and want to see what rotors and calipers will interchange.
I'm still looking, so far this is what I found on calipers:
calipers come from 79-85 El-Dorado, Riviera, and Toronado and 80-85 Seville

JJR · 09-12-2003, 01:45 PM

Your caliper info is correct for those models. This is what Hollanders shows for rotors:

BLAZER S10/JIMMY S15 83-97 VIN model "T" (4x4)
BRAVADA 91-94
BRAVADA 96
ELDORADO 79-85
ELDORADO 79-85 rotor only (Brakes, Rear)
ISUZU HOMBRE 98-99 4x4
RIVIERA 79-85
RIVIERA 79-85 rotor only (Brakes, Rear)
S10/S15/SONOMA 83-93 4x4
S10/S15/SONOMA 94-97 VIN model "T" (4x4)
SEVILLE 80-85
SEVILLE 80-85 rotor only (Brakes, Rear)
SYCLONE 91
TORONADO 79-85
TORONADO 79-85 rotor only (Brakes, Rear)
TYPHOON 92-93

For info Hollanders shows these rear disc assemblies being interchangable:

BUICK 78 Electra, Limited and Park Avenue, disc
BUICK 78-80 LeSabre, disc
CADILLAC 77-79 disc
RIVIERA 77-78 disc
SEVILLE 77-79

I listed these because I thought the 78/79 Seville was the one everybody was looking for the convert GM 12 bolts to disc brakes. (I may be wrong). Hope this helps.

mcmlxix · 09-12-2003, 02:24 PM

ok. but the rotors have the incorrect bolt pattern: 5x4.75 our trucks (5 lug) is 5x5. I am waiting to find out if I can use a stock rotor with the correct bolt pattern so rotors dont need to be machined.

If I can get an answer from some vendors on what rotors they use I will see what interchanges for that.
Thanks for the info so far.

JJR · 09-12-2003, 04:15 PM

The 77-79 Seville etc. are 5 on 5 wheels. The 80-up is 5x4.75. I have not seen the specs but I would go to local parts store and have them pull a rear rotor for a 79 and 80 Seville and compare them to see if they are the same dimensions except for the bolt pattern.

*Gee_Emm* · 09-12-2003, 06:48 PM

Hey while you are at it does the book say what PS brackets interchange for 67-72 6 cylinders?

Rod · 09-12-2003, 09:14 PM

Hollanders dont list bracket interchange...only PS pump interchange.

Pretty much any pre-integeral head 250 six brackets off nova's, chevelles, impalas. etc will work.. and they are not hard to find around these parts.

The 77-79 seville rear rotors are the correct bolt pattern.... and there easy to find here too... there are 3 sets at the local yard around here too. I grabbed a set -up for myself for some future swap, with the seville calipers you can get an emergency rear brake that will work also.

09-12-2003, 12:50 PM	#1
mcmlxix Collector of Projects Join Date: Apr 2003 Location: Las Vegas Posts: 3,106	Who has access to Hallonder books? I am doing reserach on rear disc brakes and want to see what rotors and calipers will interchange. I'm still looking, so far this is what I found on calipers: calipers come from 79-85 El-Dorado, Riviera, and Toronado and 80-85 Seville __________________ Rich 1972 K5 Blazer CST Click HERE D60 BIG BRAKE UPGRADE Click HERE

09-12-2003, 01:45 PM	#2
JJR Registered User Join Date: Apr 2000 Location: Leesburg, GA Posts: 746	Your caliper info is correct for those models. This is what Hollanders shows for rotors: BLAZER S10/JIMMY S15 83-97 VIN model "T" (4x4) BRAVADA 91-94 BRAVADA 96 ELDORADO 79-85 ELDORADO 79-85 rotor only (Brakes, Rear) ISUZU HOMBRE 98-99 4x4 RIVIERA 79-85 RIVIERA 79-85 rotor only (Brakes, Rear) S10/S15/SONOMA 83-93 4x4 S10/S15/SONOMA 94-97 VIN model "T" (4x4) SEVILLE 80-85 SEVILLE 80-85 rotor only (Brakes, Rear) SYCLONE 91 TORONADO 79-85 TORONADO 79-85 rotor only (Brakes, Rear) TYPHOON 92-93 For info Hollanders shows these rear disc assemblies being interchangable: BUICK 78 Electra, Limited and Park Avenue, disc BUICK 78-80 LeSabre, disc CADILLAC 77-79 disc RIVIERA 77-78 disc SEVILLE 77-79 I listed these because I thought the 78/79 Seville was the one everybody was looking for the convert GM 12 bolts to disc brakes. (I may be wrong). Hope this helps. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed

09-12-2003, 02:24 PM	#3
mcmlxix Collector of Projects Join Date: Apr 2003 Location: Las Vegas Posts: 3,106	ok. but the rotors have the incorrect bolt pattern: 5x4.75 our trucks (5 lug) is 5x5. I am waiting to find out if I can use a stock rotor with the correct bolt pattern so rotors dont need to be machined. If I can get an answer from some vendors on what rotors they use I will see what interchanges for that. Thanks for the info so far. __________________ Rich 1972 K5 Blazer CST Click HERE D60 BIG BRAKE UPGRADE Click HERE

09-12-2003, 04:15 PM	#4
JJR Registered User Join Date: Apr 2000 Location: Leesburg, GA Posts: 746	The 77-79 Seville etc. are 5 on 5 wheels. The 80-up is 5x4.75. I have not seen the specs but I would go to local parts store and have them pull a rear rotor for a 79 and 80 Seville and compare them to see if they are the same dimensions except for the bolt pattern. __________________ FOUNDING MEMBER OF THE DRUM BRAKE CLUB Second Owner 70 C-10 Second Owner 93 GMC C1500 Third Owner 99 C2500 Crew Cab Short Bed

09-12-2003, 09:14 PM	#6
Rod Join Date: Dec 1999 Location: Eastern - Manitoba Canada, Winnipeg Posts: 4,369	Hollanders dont list bracket interchange...only PS pump interchange. Pretty much any pre-integeral head 250 six brackets off nova's, chevelles, impalas. etc will work.. and they are not hard to find around these parts. The 77-79 seville rear rotors are the correct bolt pattern.... and there easy to find here too... there are 3 sets at the local yard around here too. I grabbed a set -up for myself for some future swap, with the seville calipers you can get an emergency rear brake that will work also. __________________ Senior active founding member. 70 3/4 ton GMC Suburban 4x4 250/4 spd. 71 1/2 ton Suburban Chevy 4x4, 350/350 72 Chev 1 ton tow truck 402BB w/Holmes 440 wrecker on propane 2005 FLSTSCI Harley Springer 85 FXSB Harley Lowrider 72 Triumph 650 Bonneville 5spd "Poor people don't have hobbies" Quote from wife.

09-12-2003, 06:48 PM	#5
Gee_Emm Account Suspended Join Date: Sep 2000 Posts: 3,991	Hey while you are at it does the book say what PS brackets interchange for 67-72 6 cylinders?



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