72 caliper casting numbers?

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Apr 14, 2022 | 12:45 PM

sassc3

Thread Starter

Instructor

Joined: Jan 2008

Posts: 155

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From: Bowmanville Ontario

72 caliper casting numbers?

my searching found to possibilities 2nd design or 3rd design
anybody know for certain?
tia paul

Apr 14, 2022 | 02:28 PM

PJO

Melting Slicks

Joined: May 2002

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From: Laporte, IN

Casting numbers are 5452281 inner rear, 5452284 outer rear; 5452270 inner front, 5452273 outer front. A date is often seen stamped on a upper machined surface.For your era Corvette.

Apr 14, 2022 | 02:37 PM

62corvette

Le Mans Master

Joined: Nov 2004

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From: Waterford WI

Easiest thing for me to remember is that mid-67 to 72 all begin with 545.

Apr 15, 2022 | 01:40 PM

gbvette62

Race Director

Joined: Oct 2000

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From: Shamong, NJ

65-66 First Design
Front: 5465954 & 5465952
Rear 5465902 & 5465905

67-72 Second Design
Front 5452270 & 5452273
Rear 5452281 & 5452284

73-82 Third Design
Front 5473795 & 5473796
Rear 5473806 & 5473807

Apr 15, 2022 | 01:48 PM

69L88

Melting Slicks

Joined: Nov 2006

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From: Apple Valley, MN

Normally, part number progression is directionally higher but for whatever reason GM managed to retrograde the numbers for the second design, then jumped to the 547s for the 3rd design. This has resulted in being easily confused, thinking the 546s followed the 545s but clearly this is not the case.

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