Actually, I'll be installing them in a truck very similar to yours. 1990 GMC Sierra 1500 ext cab without the back seat. You can just imagine it's your vehicle if you want . Thats cold man. So cold... Dont worry ,fi never lets you down i waited almost a month cus they did not have certain parts at the time .Scott was ver ycourteous and called me to inform me of it..... So dont worry u will get your equipment it just takes a little long especiallly when you know ur getting quality its bettter that you know its being done right and they are not rushing into it FI is QUALITY..