Cam plug with O-Ring

I just completed a build on mine, a 318, the only thing i would advise is if you are using an automatic transmission, i had a 904 auto transmission and when i connected the flex plate to the torque converter the bolt heads were really close and my plug was concaved and fit kinda like the freeze plugs,if the plug you have sticks out very much ,your flex plate bolt heads are gonna be close.