Oil filter issue!

did I forget something?? 318, out of a 78 aspen. Put a rack and pinion in my 66 dart. Was going to put dougs headers in but didn't like the fit. So, went back to stock exhaust. I had a 90 degree filter adapter in and it had a small leak. Took it off since I went back to stock exhaust. The car was running last year, I'm sure I was running a Mobil 1 m1-204 filter. Put one on, the oil is literally spewing out! I'm pretty sure all I took out was the pipe nipple for the filter to accept the bolt on the 90. Did I forget something?? Is the M1-204 the right filter for a 78 318? I'm losing it, I swear! Any help is appreciated!