Head swap question

[Badass_yellowGT]

Hi all
i have a urgent question to ask tommorrow i plan on purchasing a head swap kit from parkway i have asked many people if i will have a problem with my headers going on right. in the 2002 ford racing catalog the headers say specifically that they will not fit 2000 plus engines but will with minor mods on 99 mustangs since this is a considerable chunk of change i will be dishing out i need to know if anybody has had any problems, that is people who have frpp headers on there 98 stang and have done the swap. i myself don`t see a problem but others i have talked to give me conflicting information also can i still run lower octane gas when i need to.with thw higher compression


thanks in advance


i already did a search and could not find this information