Ultra massive oil leak from filter

[Maxian]

Just fired up my 454 for the first time.
Was a supposedly a fresh engine and good runner with a bad cam. Engine had very little miles and it showed.
I installed a new cam and went through engine and all looked good.
Here's the issues which may or may not be related.
#1)
While priming engine with cordless drill it was pegging my cheesy oil pressure guage. A very, very slow speed would give me 40-50 pounds and full power on the drill would peg guage, which I'm guessing would equate to 140+ pounds.
#2)
As soon as engine fires it blows oil out the top of oil filter ( between filter and block ). I'm talking losing 4 or 5 quarts of oil in seconds.
Checked filter. It was loose. Thought I found problem. Cranked filter down and fired engine. Ran for 2 seconds and the oil started pouring out again. Not a double gasket.
I don't remember taking adapter off so I have no info on whether it's loose or bad. Going to try and attach a picture.
You guys are awesome.
Thanks for any input.
Brad

P.S.
Cuz my wife wanted it pink