barry grant speed demon 650. MMMMM.
Take your pick,
Mechanical secondaries,
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=763&item=6940536218
Vacuum secondaries,
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=763&item=6938608398
I would say go with the...