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I have a 440 built to a 512 stroker, 906 heads, TTI 1 7/8 headers.

I am looking at getting new spark plugs. Are these any good?

Accel - Header Plug

Part # 8197 / 437s

Thanks


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I think that the 437 is probally a hot plug, what compression ratio are you making and what grade of gasoline are you using?I have used the Accel 137, 134 and 132 in a iron headed BB similar to yours (440 block 4.25 strokex4.375 bore with ported big valve 906 heads)with 9.25 to 1 compression using CA pump swill, it ran fine on the dyno but I did't get the car running until we moved to Oregon on the summer of 2005. It, the motor, seemed to like the 134 best Oregon did not have Ethanol in there gas back then. I swithed the heads that winter to a set of Eddy RPM aluminums and I had switch the plugs to longer reach plugs,Autolite AR3911 and AR 3910 I don't think Accel offers more than one shorty spark plug part number