Radiant heat from the header will kill your starter, so you shoul get a starter shield blanket from Summit racing, runs about $24.

Along with the starter blanket I ran heat shielding along the passenger firewall, since there was only 1/2" of clearance between it and the header. A 2" BL or beating of teh firewall would have allowed for more room, however I installed the headers first. IIRC, the extra material from teh starter blanklet worked for all of teh other shielding that was needed. The blanket is good up to 750 degrees of contact heat so it can sit right against the header.

The p-side header also burnt the parking brake lin, melted the plastic coating to the cable and wouldn't disengage the brake. After getting a new cable, I rerouted it and used some heat shielding.

Header tape can solve a lot of heat related problems and reduce engine bay temps, but can also cause header rott which will void a manufacturers warranty.

I have been running the headers now for 3yrs and haven't had any heat related issues, other than the ones mention, however I run an lectric fan which runs all the time, so this may be why.