SunWizard wrote:They are probably not rated for vacuum.
That's why Veggiestroke is the all-round best plumbing style (irrespective of PSI /flow spec).
Pressurised veggie lines NEVER suck in air bubbles, they can only drip veg out. Sure, if parked for a relatively long time, a Veggiestroke style SVO conversion might allow air into the lines, but that's unlikely and far different from being put under vacuum during normal operation...
Veggiestroke plumbing can be adapted to ALL diesel SVO conversions including the honoured Dodge 12 valves and the Merc IDIs...