I just got this manifold all bolted in what goes in the hole right behind the water inlet? and what goes in the hole right behind the carb on the same side.. thanks... i have the water temp sensor on the front jole across from the water inlet...

 

The front hole goes to the heater core. The back one is for a vacuum tree - brakes, ac, etc..

 

so i have no heater core, no ac, no power brakes.. so Can i just plug both holes?

 

Use the back hole for a vacuum source for a vacuum guage. Don't use it for a PCV valve. Plug the front hole and use teflon tape on the threads also to prevent leaks.

 

what vehicle is this going into? year/tranny etc..

 

the truck is a 1990 but the motor is a 95, its an offroad only truck, so smog is not a problem...

 

c6 transmission...

 

and your ditching the efi why??