My 292 / mumert intake / 500 cfm eddy / pertronix / isky cam / original manual 4 speed and 3.0 rear gears...
My question is that the engine builder used autolite 46 plugs. These are mentioned to be too hot on the y-block tune up page. I bought some 45s today and about to put them in. What other tuning should I look at when changing to a colder plug. Is there a better colder plug for my setup that the autolite 45s?