Rear LCA Applications

No wonder you can still buy new GM HD rear LCAs.

1978-1990 GM REAR LOWER TRAILING ARMS HEAVY DUTY APPLICATIONS:

03-06 GM HUMMER H2
91-96 BUICK ROADMASTER WAGON
2000 CADILLAC ESCALADE
02-06 ESCALADE ESV
02-06 CHEVY AVALANCHE 1500
77-85 CHEVY IMPALA
91-96 CHEVY IMPALA
1978-90 , 91-96 CHEVY CAPRICE
02-06 CHEVY SUBURBAN 1500
02-06 CHEVY TAHOE
02-06 GM YUKON
02-06 GM YUKON XL 1500

I didn't know they were used on so many different vehicles up to 2006. Even the H2!

Theres alot of attention paid to upgrading the lower control arms here, but what about the uppers? 94-96 Impala pieces? Are 9c1 spec an improvement over the Impalas? What about any F car uppers and lowers? Im asking because I have an 88 wagon Im getting a build list put together for. BUT, I want to use all gm parts. There is always a NAPA in town, but Hotchkis parts may be hard to find if Im broke down in Jewitt, Illinois...or some other tiny hamlet across America lol.

anyone ever used the Driveworks Chassis Products "Police Package" upper control arms, PN 520-137?