Hey. I don't suppose that a good reg would call a 3b OOP w/ many hands that contain a 5x, so I wouldn't worry much about it. I also think that he can XB 78s ott to define your range more/strengthen his perceived range - the 5x is generally better for him (not that he has a ton of them, but still), so he might expect you to realize that and XC this turn assuming he would fire with all of his floats.

That being said, I agree that XC the R sounds good.

As played, I'm not sure - generally a BXB line represents a middle value range, but it's not like our range is capped otr or anything - we can still play any OvP this way - any worse OvP would bet the T for protection + we additionally extract value from his floats. Also, your line doesn't look like a bluff at all - more like a hand trying to make up for 'lost' value. 

I think you have to expect him to turn a hand like 88/89s into a bluff (blockers) in order  to make a call, but I doubt he'd XB 100% of those ott, so I'd probably just muck it.

Put more details in your post. What is his sbraise%, f3b%, call3b%, 4b%. How does he view us?