Im trying to figure if i have and older 13b or newer 13b ? I have a geneburg carb setup peripheral ported. Getting spark plugs and noticed they dont really screw in all the way snug. I dont know if its how they are or could it be my consistent flooding of the plugs be because wrong ones for the motor maybe they thought it was a 91 so bought 91 plugs or like he told me the motor was swapped from a starlet and doesnt know if its older 85 13b ?

And what spark plugs do you recommend for 13bpp that cant be driven daily because it just floods the stock plugs almost like there not burning enough.. Thanks