Part#AS0070R - AussieSpeed 2 x 4 barrel square bore Carter & Edelbrock adaptor to go on Jimmy blowers.  This one siuts the 4/71 type GM blowers. Cast from aluminium. As you may know a 4/71 Jimmy blower is short and fitting 2 x 4 barrel carby's is tight, however AussieSpeed have managed to nest 2 x carter type smaller square bore flange in the 400cfm range, side by side.  Also suits the Edelbrock square bore flange. This part number is for the raw version, a polished version is also available here from KustomBitz. Incedentally you can also fit a pair of our "Cross Ram" adaptors [Part#AS0088] to this spacer which would enable you to fit 2 x Imco 300A type or similar LP gas carburettors to the 4/71 GM blower. NOTE: It does not fit standard Holley flange or spreadbore flange carburetors which are larger and these carburetors require much more space around them.