Won't enhance the experience in any noticeable way.
BA orally isn't bad already (in the sense of getting to local GI receptors) and that route won't have significant effect on BBB crossing
And if you could, you wouldn't want to. My experiences with high dose loperamide were almost as bad as opiate withdrawals themselves - dizzy, sick, dry mouth worse than 200mg of cannabis edibles, dry eyes, confusion, dysphoria, and noticeable heart palpitations worse than IV coke, and I still felt 80% as opiate sick as I began on top of all that.
I've tried a lot of fiddling with it, and no matter what, I find it shines best in medium doses, not high ones