This was on my 71 GS 350 4-speed when I bought. I swapped back to a QJet from Everyday Performance after it started leaking after sitting for 2 years during the rebuild of the engine. I'm not going back to a Holley as long as QJets are available. It is a Holley List-6528 with a 1703 also on the air horn. It is a 650CFM double pumper, single inlet line with a spreadbore QJet-style base. It has a choke that worked with a stock manifold before I swapped to the TA intake. It ran fine when we pulled the engine out. However, it spewed gas out the top where a float adjuster would be on standard dual line Holley when we tried to start the rebuilt engine. I'm putting a $50 price tag on it, but I have no earthly idea what it's worth. Make an offer and I can ship it in a USPS flat rate box or the carrier of your choice for actual shipping charges. Pics. I used marine JB Weld on the top of the needle/seat cap. It holds vacuum but it hasn't been run since I swapped the QJet. It might only be worth parts. Where it was leaking before the marine JB Weld.
