I figure that I need to replace the coolant temp. sending unit as my gauge gas gone haywire but I can't find the thing. Haynes manual says that its on the front of the drivers side cylinder head but I don't see it. I figure the guy who had the car before me moved it. What color are the wires leading to it? I think I will be able to find it this way.
bsa

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"If they do not run, Then they will die." - Stonewall Jackson

'87 IROC, 355 TPI, Converted to SD, 700R4, B&M Megashifter, 3.42, Trick Flow Twisted Wedge Heads, Comp Cam, Comp 1.6 Rockers, Lucas 23# injectors, Edelbrock headers, Flowmaster 3'' exhaust, gutted cat, Mallory coil, Mallory HyFire IV ignition box, Mallory Sidewinder 8mm wires, Autolite platinum plugs, K&N filters, Transgo Performance Shift Kit, Corvette Servo, 2,000 Stall Torque Converter

It's right in front of the #5 spark plug. It should have a white cover on it. The only other thing down there should be the spark plug wires themselves and the o2 sensor. I think one wire running to the temp sensor is green.

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89 Iroc-Z LB9 305 TPI auto 2.73 posi:
3" Dynomax "cat" back,K&N filters, TB bypass, 3" pipe in place of cat, cleaned and flow-matched injectors, 180' thermo, mild ignition mods, synthetic oil, kicker sound system, soon to attempt engine swap...

It should be betweeb your #1 and #3 plug.

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1989 IROC-Z 5.7L

That's right - #1 is the farthest plug forward on the drivers' side (in case you don't know), then the next is 3, next 5, then 7. It's right in front of the #3 not 5