I recently acquired a 70 Gs 455 that has been sitting for a few years starting to do basic tune-up rebuild carb ect. It has a 72 motor with b4b mt headers kb 116 cam stinger s4, Gessler stage 1 iron heads, 10:25 comp, msd 8mm wires currently has a accel 276 plug any recommendations Thanks, Jeff
NGK UR-5 http://www.rockauto.com/en/parts/ngk,2771,spark+plug,7212 If you prefer AC plugs, go with the R43TS, http://www.rockauto.com/en/parts/acdelco,R43TS,spark+plug,7212 I think the NGK is a better plug though.
Ngk x2 ran ac-delco, then autolight racing. The Ngk plugs are much easier to read, and sooner and are actually less money
