The one I use for the inline Chevy 6 came on 1981 Chevy trucks with California emissions. I order one from Orielly's . It is a part# cardone part # 30-1677 They want a big core charge, just put a regular dist in the box.
Inliner Member 1716 65 Chevelle Wagon and 41 Hudson Pickup Information and parts www.12bolt.com
