I have a 1996 ram 1500 with the 318. i did the gasket repair. what i did is cut the runner out of the middle. well after i put it all back together forgot to put a plug in the hole behind were the egr tube goes. i have tryed 1in 3/4 and 1/2 the 1/2 in is just a hair to small. can someone help me find the right size to put in it so i can block it off. if u need a pic i will try and get on for u all
thank

 

Try 5/8ths lol