4.5" filter, alternator, ESC computer
 

I removed the ESC computer off my 83. It's free for shipping costs only. I don't know if it works. My ZZ4 does not have an ESC distributor.

K&N 4.5" used filter. A chrome base is included, both upper and lower lids. Included is a 1" plastic spacer to clear most throttle linkages. Retail $56.95 for just the filter at www.summitracing.com
Filter needs a clean and new oil. The old 305 would scream with the large filter. The ZZ4 liked it too. Asking $40+ shipping. Picture available.

Cavalier 100 amp serpentine alternator. Year model 98. I need to check the box. It should fit other GM vehicles. Removed and replaced with a 145 amp alternator. $25+ ride.