i have never seen one.
it should be with the fuses,i just replaced mine yesterday.bottom left hand corner of the fuse box
Left of the steering column, under the dashboard.
The 305 is a small black Chevy in the gmc truck. So yes it has a right and left bank = 2 heads one on the right and one on the left...
above oil filter to the left.
on the left side of steering wheel. www.chesapeakeconstruction.com
behind the glove compartment, to the left
s/b on the left side of the driver side door jam
Need to know what size engine you have.
123456 left bank first
check the ait. on yhe left side of carb..it control's idle.
It will be on a tag on the top left drivers side of the dash close to the bottom of the windsheild.
Left side of the vehicle by the firewall, if memory serves me correctly.