What plugs???

I had AC R45TS plugs and was told I should use the NGK TR6 plugs but the TR6 treads are alot longer than the R45ts...any suggestions???
Thanks,
Adam

autolite 104

what if I went from the AC R45TS to an AC R43 TS??? Also, my timing is set at 10 right now...what do you think I should set it at?
Thanks,
Adam

did u try fitting the tr6.....they should fit

i would get those for nitrous applications

If you are running a tpi motor you cant use those plugs. They are meant for aluminum heads. Go to autozone and look up the stock plug for your car, then ask them to look up th eone step coldr plugs and get those instead. Now if you have aluminum heads you can do the same thing. I personaly like autolight racing plugs, but they are not cheap, but they work the best for NOS

Drew