[Gromit]

I found a photo of that union that midniteblues wrote about - also you can kind of see the alternator wiring in the foreground and the union he mentioned in the background... (sorry I don't have a working digital camera at the moment so this old photo is all I have)

(Attached photo)

If you do end up using the capillary type metal oil pressure line from the block to the dash gauge - the previous owner of my current truck had the existing tubing all wackily bent in every which way all over the engine bay - and I found that I could wind even that 40 year old metal tube into an almost perfect spiral with careful tension around a steel 1-3/4" or 1-7/8" diameter round galvanized fencepost set in my bench vise.. so by doing this it cleaned up all those funky kinks in the gauge tube ... you have to pull on the 1/8" tubing quite a bit as you wind it around the tube..

Then slide your newly wound coil of tubing off the "fencepost" tubing and you have a nice coil which you can expand or contract vertically as necessary to clear your spark plug wires or trans kickdown cable; etc..

So just a thought - it worked well for me..