I'll chime in... I wouldn't doubt it being Motion sold parts on your car.. But we gotta start being realistic.. Motion Performance ie Joel Rosen was in business for a long time (mid 1960s thru late 1980s-early 90s??) And sold A LOT of stuff from every automotive spectrum throughout the years... but it seems a lot of people these days seem to think that ANYTHING with "motion" on it is super rare and worth tons of money.. and it really isn't... case in point..
http://cgi.ebay.com/ebaymotors/ws/eBayIS...002947&rd=1 ... a Baldwin/Motion washer?????

That'll add about 400hp.. ............ There are RARE "Motion" items.. The BALDWIN/Motion cars modified NEW at Motion and sold NEW through Baldwin Chevrolet with a warranty.. Cars like Marks '68 Phase III L88 427 Camaro and Larrys '70 Phase III GT LS7 454 Vette and Dan's '73 Phase III LS6 454 Camaro...etc. THOSE are "rare" and worth the big bucks... but when I see a common part worth $3 to 100 bucks fought over to some rediculous price in the hundreds of hundreds just because it has an old Motion mail order sales receipt or a sticker on the package... that just makes me think things are getting out of hand these days...

Anyone else feeling the same?