What intake? If it was a TQ pad, I wouldn’t be so keep on making the mods myself so quickly without a flow bench. On a squarebore, it’s a little more straight forward. Being that I never ported the plenum of an intake, I have no advice to hand out.
@pittsburghracer ported my standard LA M1 single plane intake. He has a thread on it. Flow tested with before and after numbers. You can read about it here;
Some M1 porting pictures and flow numbers