[Vwdiesel] Oil pressure/temp gauge options

[Shawn Wright]

I'm looking at my options for gauges, and am pretty sure I will go with 
something like this for my 1.6TD Vanagon conversion:

VDO Vision or Cockpit Black series (any advice - I can get Cockpit series 
about 15% cheaper -they appear very similar):
EGT
Oil Pressure
Oil Temp
Boost

The oil senders I'm not sure about. I'd like to keep the dual sender dynamic 
oil pressure system intact, so I need the stock switches at head and oil 
filter flange. But I also need to add temp and pressure senders. I could get 
a dual pole VDO sender for the head, and use the 7psi warning contact in 
place of the stock low pressure switch at the head. That would mean I 
could place a brass T at the filter flange, and have stock hi switch & oil 
temp sender there. Is there any reason to avoid having a T at the filter 
flange? ie: should I put the T on the head instead for some reason, and 
leave the filter flange with stock switch only? Does the standard VDO T 
(M10x1 thread) seal ok on the VW head/flange? I've had problems with an 
old gauge using M10x1 threads leaking because it doesn't have the 
shoulder for a sealing washer like the stock switches do.

Any advice/opinions welcome.

Shawn Wright
http://zuiko.sls.bc.ca/~swright
'85 Jetta D 
'88 Westy 2.1L, soon to be 1.6TD 5 speed
 (see progress at http://members.shaw.ca/vwdiesels)
'82 Diesel Westy