Anyone else have problems with the plastic side tanks on the radiator cracking? Is there a reasonably priced alterative? I ask because at the moment my radiator is being replaced. Also I am having a lower temp thermostat put in (180-190). Is there any need to go with a different temperature spark plug? This is something a mechanic suggested. Thanks for the help.

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1989 Firebird 2.8L MPFI
K&N filter w/modified airbox
Flowmaster 2.5in Cat-back
Accel Cap, rotor, coil, 8mm wires, Rapidfires
Energy Suspension bushings
Edlebrock springs
Bilstien Shocks & Struts
Shift Kit
265/50-15's on stock rims (really)
Lots of TLC

 

Radiators are a maintenance item. The brass/copper kind are a little more durable but weigh a whole lot more.

There's no particular reason to change spark plug heat range because the coolant temp is leing lowered. If the car has a tendency to ping or run on, cooler plugs can help; other than that, just use what the book calls for and you'll be fine.

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"So many Mustangs, so little time..."
ICON Motorsports