Thanks Paul, but no, please don't dissasemble your car. Theese guys at CRG forum have since set me straight. Remember (newbie) thats me. I now can see your plugged speedo hole and the other open hole up high in center of firewall. Thanks alot though for offering.
I have an obsession now just starting too. You can view it under (general discussion) board. L30/M20 find. That speedo cable hole that your car has was initially pierced/located on my car by Fisher bod factory, but not opened up enough to be used.
Does your car have a floor stiffener plate under the rear seat passenger side like mine does?
Thanks again, Jeff