On the valve covers in my signature picture, the spark plug tubes are recessed in. So from the top of the valve cover to the top of the spark plug tube is 1.1". This recess is 1.6" diameter. The spark plug tube itself is 1.1" inside diameter. From the top of the spark plug to the top of the valve cover is 4.85".

Does anyone have a coil that fits this dimension?

spark plug tube.jpg
[img]http://i.imgur.com/boeexFms.jpg[/img]
31 Plymouth Coupe, 392 Hemi, T56 magnum
RS23J71
RS27J77
RP23J71
RO23J71
WM21J8A
I don't regret the things I've done. I only regret the things I didn't do.
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