273 Intake Gaskets

i always use felpro gasgets and the 0.60 imo would be the best choice unless your intake was milled the printoseal come in black and blue i think. put the print side toward the intake i use indian head gasget seal on the head side and you can use the cork end gasgets without problem if installed properly some use silicone . after install i always let things set for a day or so to dry and set up and torque is 25 to 30 ftp and follow the torque sequince .thisis jmo dosent mean its right and maybe your oil leak is in the heat crossover a pic would help maybe its not the intake gasget good luck