Changing the build slightly again, got a different carb, so I'm selling my 850 Holley with new Proform base. Bought the carb about 4 months ago, last run bout 6 months ago adn the guy who was borrowing it pulled the jets out when he returned it to the p.o. (EDIT, read post 3...) . I have not mounted it or run it, but it is clean and appears to be iin good condition. Will need jets and bowl gaskets, but comes with fuel lines as pictured -- Asking $200 plus shipping or trade for BBC Victor R or similar tall rectangle port Dominator pattern intake..
list # 4781-2 is a model 4150, 850 CFM Double pumper, mechanical secondary
it calls for 80 jets in both ends and a 6.5 power valve in both ends
renew kit part # is 37-485