You will need an adapter for the oil pressure sender. The later blocks have a 14x1.5 metric hole, the oil pressure sender is 1/8" NPT. Sunpro used to have a set of adapters (Part number CP7573) you could find at Pep Boys or other auto parts store, egauges.com also used to sell one. You need the M15x1.5 to 1/8"NPT adapter.

your wiring looks good to me, I ran the wiring out the firewall on the passenger's side through an existing rubber grommet, under the exhaust and down to the oil pan for oil temp'. Check your fuse box for a switched fuse, the brown wires for the lights are common behind the center console and will handle the current easily. I used a screw at the top of the frame for the console for ground. One wire for power will be fine, all the gauges put together draw less than one light.

Gauges are cool, I'm running Oil temp, Oil pressure, volt, small tach, and ambient air temp in my '88.
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Dave Shannon
Durango, CO
'67 1800s
'88-240
'01 Wrangler
'06 F250 Diesel 4X4