I dont care to trust the oil pressure in my motor without a guage. I have on that I'd like to put in my CRX (B16). Where would I tap in for the Oil feed line for the guage? I know that on the back of the block I believe there is a plug thats removed by I think an 8mm allen wrench. Is that where I would have to put it?

If so, what size peices would I need? I know what line to get, but I dont know what size fitting would have to go into the block, after that i'm assuming all around 3/8" would be right?

Thanks!