Across the A/G listings for '79-'81 (2nd design for '79) list the rod as 14008223 & swivel as 3840845. Any model, any engine. This will be what the reproduced ones will be based off of.
Here's a link to the '76-'81 Chevy, Pontiac, Olds & Buick parts books.
http://www.gmpartswiki.com/query
As per parts fitting in general, the A/G Grand Am may suffer from the same issue as the A/G Cutlass Supreme, nothing fits according to the aftermarket parts catalogs. Just say it's a LeMans & it should work out.
Here's a link to the '76-'81 Chevy, Pontiac, Olds & Buick parts books.
http://www.gmpartswiki.com/query
As per parts fitting in general, the A/G Grand Am may suffer from the same issue as the A/G Cutlass Supreme, nothing fits according to the aftermarket parts catalogs. Just say it's a LeMans & it should work out.