800cfm dubbelpumper

i have a 800cfm dubbelpumper spreadbore carb i got my hands on with an old tunnelram manifold, think the carb is pretty intresting since i havent seen any of these anywhere and i cant find it in the Holley catalog so i gues its no longer possible to buy new, this carb is missing some smallparts like accelerator pump cam and a floatbowl and looks alitle rough but i have taken it apart to see if all surfaces are still straight and/or square and that is the case so i wonder is it worth trying to put it back togheter and get some new parts for it or should i just try to get rid of it?
i think that it may suit my 340 pretty good small primaries to keep it hapy at low RPM and realy big secondarys for high rpm power..
what do you think? is there a reason why they stoped making them?
thanks in advance