plug gap

[boats&bars]

I got new plugs this weekend and cant find any kind of gap info . the motor is a harman marine 320 hp 454 bbc stock .the plugs are autolite 26p anyone got any ideas on a gap for this motor????

[Moneypitt]

I got new plugs this weekend and cant find any kind of gap info . the motor is a harman marine 320 hp 454 bbc stock .the plugs are autolite 26p anyone got any ideas on a gap for this motor????
The plug gap is dictated by the type/output of the ignition/coil. With a low voltage mag the gap is .018, with a standard points/condensor, .035, with a GM type HEI the gap is .045-.060, depending on the year/output, and I think there are even systems now that ask for .090. I think with a HEI I would start at .045, it should run OK.

[Cheap Thrills]

Directions
remove old plug. Open new plug package. install Plug and run the dogshit out of em
Seriously I believe the gap should be set between .035 ~ .045
Good Luck
C.T. :wink:

[boats&bars]

its got a merc thunderbolt distributer and a bosch blus coil