These are my 1 1/2 Doolings . I used to have a scan of the Dooling parts list and 3 view which got lost in a hard disc crash but I'm certain it showed a LH exhaust (which is why there's still confusion).

The other engine with the RH exhaust was made here in Adelaide by Gordon Burford (of Taipan fame) and was sold in a Sabre box. Originally it was called a Sabre 29 with the Sabre down the transfer port but North America, who made the F-86 Sabre, came the heavies with him and threatened a law suit if he didn't change the name (can you imagine some country ordering 20 Sabres for their air force and ending up with 20 model engines?). Gordon couldn't afford the legal costs so he filled in the name in the crankcase mould while he considered what name to choose next. Shortly after the first Glo Chief was born.