Jock, maybe this will help if you didn't get the alternator wiring sorted out.
http://s1109.photobucket.com/albums...on=view¤t=Alternatorwiring.jpgFor the oil gauge you can use an 1/8"npt "T" and put a short nipple on the center leg and sensors on each side. That is what worked for me, anyway. I am using an HEI on my 350, though.
keep us posted,
Les