Has anyone ever used the EMPI HPMX carburetors on a Datsun before? I tried to do some searching and couldn't find much of anything?
http://vwcatalog.empius.com/vwcatalog/2014/60.html
https://www.youtube.com/user/EMPIHPMX/feed
They are mostly used on VW air cooled engines, but I don't see why you couldn't just bolt them right up. They have a few videos showing dyno results where they made a few more HP than there Weber equivalents.