So my 87 suzuki samurai 1.3 liter has starting pumping engine oil out of the tube on the mechanical fuel pump that goes to nothing you know at the bottom... and it is building pressure in the crankcase. has anyone ever experienced this problem?

is it just a bad fuel pump or could i be facing bigger issues like a cracked head or block blown headgasket?

it is bad can pump out 2 quarts in a matter of 15 minutes. HELP???