1979 firebird 5.7l V8 parts query

[Marcopolo]

Hi folks

New to the forum, I'm looking for some help identifying a part, I've had to replace the rear bearings on my 79 firebird when stripping out the differential the mechanic noticed some washers where broken I'm unable to find the parts online and wondering if someone on this forum can help as you can see both are cracked

the other problem is that I live in Ireland so parts for American cars are very hard to come by

 

[melsg5]

They come as a kit with the gears. Pick the correct one.

https://www.summitracing.com/search/year/1979/make/pontiac/model/firebird?N=part-type%3Adifferential-carrier-rebuild-kits-and-spider-gears&SortBy=BestKeywordMatch&SortOrder=Ascending&keyword=Differential

 

[Marcopolo]

Ah ok I appreciate the response I'm not sure which kit is correct would it be the first one or how can I check ? Again appreciate your help

 

[melsg5]

I narrowed it down to 6 assuming you have the standard 8.5" 10 bolt rear. 4 are for 28 spline axles, 2 are for 30 spline axles. See what you have and make a choice.

https://www.summitracing.com/search/part-type/differential-carrier-rebuild-kits-and-spider-gears/year/1979/make/pontiac/model/firebird/differential-case-design-type/gm-8-5-in

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[Marcopolo]

I narrowed it down to 6 assuming you have the standard 8.5" 10 bolt rear. 4 are for 28 spline axles, 2 are for 30 spline axles. See what you have and make a choice.

https://www.summitracing.com/search/part-type/differential-carrier-rebuild-kits-and-spider-gears/year/1979/make/pontiac/model/firebird/differential-case-design-type/gm-8-5-in

Great thanks appreciate your help