Outer Limits 4x4 Board

hey guys have a small drama. put a 5L commo 8 into my 96 lux and struggling to get snorkel done. when hooked air intake to stadard airbox engine really struggled to breath. what have others done??? modify airbox somehow to 3" in and out, mandrel bend stainless snorkel but then still have airbox prob. was thinkin a flat air filter and make own box. would like to keep safari snorkel but it gets a bit narrow towards top.
cheers for any help or point me to links.
and yes have been trying search and cant work it out to find exact what im after!!!!! i must be spastic