This pic sorta shows the differences between the original duals (early 4-screw domes) and my triple (later 3-screw domes) set-up. The dual set-up is the original motor and drivetrain for the #958 / 70 Z and the trip set-up is a spare motor for my 72 Z which now has the 3.1 Stroker in it. You can't much but you can see the placement of the third float bowl and some of the plumbing. Hanging it is the EZ part. The tough stuff is getting the air flo and jetting right.p>Uploaded by david.russell.