Hi Guys

i have Chevy sbc installed in my GD. I have occasional cooling issues with air blockages

the highest point on the system is the pipe from the thermostat housing down to the header tank so the curve on the hose sometimes traps air I have a small breather vent but don’t want to worry about it and have too unscrew it etc

my engine builder has suggested I get made a bespoke expansion tank and run the heater hoses though this tank sited higher than the thermostat and discard the original low sited tank

any ideas or input would be greatly appreciated
Howard