As usual, I am confused.

I want to add an oil pressure gauge to my syncro. Most places
suggest you use the VDO-360009 sender and the sender hose
extension adaptor VD0-150752.

www.busdepot.com - indicates the exension adaptor is not
needed for 73-83

www.marksbugbarn.com - indicates the extension is only for
type 4 engines

www.bus-boys.com/bbvdo.htm - sells a VDO-360023 sender that
is mounted to the cylinder head that does not require the
hose extension adaptor

www.motorworks.com and www.bowwow.ca - doesn't even list the
hose extension

What have the rest of you done? Is this hose extension
essential on an 86 syncro?

Thanks,
Chris