6 Bolt or 7 Bolt?

[vannaksgsx]

I know it's a 6 Bolt, but what's that "7th" hole for?

(the smallest bolt hole, not threaded)

 

[bane3d]

A pin goes in the 7th hole.

d

 

[motorswapman]

Its for the pin from the flywheel.

 

[thomcasey]

There is normally a pin in there for the centering of the flywheel. Cranks for the auto's do not have the pin. You might want to look into a machine shop pressing one in for you. I run mine without one, but I am stock. Not sure how it will run with higher power. I just used a drill-bit to center the flywheel, bolted it down and removed the bit.

 

[BLINKY619]

Guide pin

 

[fede]

^correct