We are getting close to firing up this 400/512 with the 440 source stroker kit. We would like to get some spark plug recommendations from you fellas. 10.5:1 75cc Aluminum Bull Dog MW ported heads. Pistons are -24 dish.Comp cam XR292R. MSD. 1050 Dom. Indy MW window intake. TTI 2". This will be mainly driver on the street in an area with very little stop n go traffic. Will probably mix a little 110 with the good 91 oct. IF,, you need any more info let me know.
Thanks, D.y