Slant header ID?

Yes, they are hitting the engine mount and the oil pan. They clear the bellhousing. There would need to be a LOT of clearance work to get these to fit.
I wouldnt give up on em. I would bolt them to something solid, wrap a ratchet strap around the tubes that interfere, and pull! Use a comealong or winch if you have to. A kink in a tube is meaningless, pull it till it clears BTDT..