This is a non-standard 7" SINGLE Diaphragm CHROME Brake booster for various custom applications.
NOTE THAT NO BRACKETS are provided on the rear - only the 4 bolt flat panel studs... but if needed.. a set of Zinc Chromate finished angled brackets for 64-72 era fitting are available separately (see PW650) that bolt up to the 4 bolt mount points.
Note... that the piston reach is for the mostly '69 & up master cylinder with the normal shallow piston pin depth.
Often referenced as handy on 64-72 A body (GTO/ Chevelle/LeMans/Skylark etc) and 67-69 Firebird and Camaro .. where a big block has been fitted or restrictive custom work presents space disadvantages.
Sometimes used also on RHD Firebird's & Camaro's where hedders are used to help reduce crowding around the firewall.
Stock is limited ...
Delivery is covered within Australia - but not to Darwin / NT or NW regional remote stations and towns.