CIS injector hole plugs, carbed engine
 

What is the best method to plug the injector holes in CIS heads ? (not MFI)
The engine is carbed.
Anyone make a suitable remedy ?
TIA
Rory

There are insulators to encompass the notch
I would contact PMO for a set.
Bruce

That's a good idea Bruce I'll call them.
Thank You
You've brought something to my attention.
The heads I'm working with have a hole that extends from the top surface
of the head directly into the intake port aimed at the valve.
It is a ~14mm hole, not a notch.
The hole is smooth, not threaded.

On the 2.4 CIS heads, you can run a tap into the hole and then plug them just like you do with the MFI heads.

Tom hit it, the 73 CIS heads had a pressed in aluminum sleeve where the MFI injectors went.
once removed, there is no threads.
That was an only year application.
Bruce