Might also think about wraping the upper radiator hose.I had some header wrap left over from my crossover pipe on my GTP and it seems to help.
Here is another good product....Design Engineering, Inc. (DEI) Reflect-A-Cool Heat Shields
Maximum Ambient Temperature (F): 400 degrees F
Installation: Self-adhesive
Part # DEI-010412 from Summit
Protection against extreme heat.
DEI Reflect-A-Cool heat shields are sheets of reflective material with an adhesive back which offers outstanding protection against extreme heat. A combination of fiberglass and an aluminized layer of reflective foil, Reflect-A-Cool heat shields are ideal for firewalls, marine engine bays, RV "dog house" or in the tub of a racecar where typical mechanical fasteners cannot be used. Reflect-A-Cool will reflect up to 1000 degrees F and will protect against a direct continuous temperature of 400 degrees F. Superior protection against radiant heat, self adhesive for easy installation, and can be easily trimmed and cut to fit. Virtually no clearance needed.