We're getting a 3v oil pan. You can put a 2v pan on a Teksid block and it doesn't touch it, it too is a 6 bolt main. Only a 2v pan on a 3v bottom end and you get crank hitting the pan? We used a 3v pickup and 3v pump. I would go for the added space of the windage tray and gasket, but I don't even think 1/4" would make it clear. We're positive it's the drain backs, just gotta pull the pan to prove it.
The point isn't how to fix the issue, we're getting a 3v pan to correct it. It's answering for the absurd bullshit of how a 281 modular, regardless of block type, using the same size bottom end hardware specs Ford has used since the 90's (bore x stroke) won't accept any 2v/3v/4v pan, not because it won't fit in the car, but because it doesn't clear the rotating assembly? 281 modular pan does not clear a 281 modular rotating assembly, because.... it's got 3v heads on it? See my point? I'd rather know WHY than how to fix the problem.
Edit: It can't be said that pan dimentions are different, we measured. The pans are the same L-W-H, notably the drain bolt location is different. So again, it comes down to internal conflict.