Tator, "Big" isn't the word as much as "flow". Too big and incorrect shape will hurt more than help. Flow bench is essential. I leave this work up to experienced people. If you want to be "experienced" befriend such an expert. Patience and time is required.
The WF's have the same size exhaust port that the industrial Intek's and Model 15's have.
The Animal intake port is the same as the Industrial motors except it has the large restriction that those motors have removed.
The WF intake port is different from any or the above in that it is at a different angle and has been machined rather than just a casting.