I have a 84 k5 with a stock 305 with federal emisions. My vacuum hoses of course are shot so I'm using my emissions sticker to re run all of my hoses. I've got a lot of it done, but I need help with one thing. I have two of the rubber four hose plugs towards the front of the engine. They are both shot. One sits on top of the thermostat housing, and I don't remember what the other one is hooked up to. My question is, do I need to find exact replacements for these things? or can I just plug new hoses up to the outlets one at a time? I hope this makes sense. Thanks P.S. did some big puddles this weekend on a trail with my daughter in the truck. She's only 6 and already a mud junkie. One of them was a little too deep. We started to float the floor pan and lost traction. Luckily, we were close to the other side and coasted through. You got to love rainy weather.