I believe you Hanky. You will make the full bulk to 275 lbs and deadlift 500 lbs. You got this!
Speaking of Deadlifts,I have just watched a video of Hulkatron deadlifting 335 with ease, in perfect form, and he had plenty left in the tank..........so Hanky,your mission if you choose not to chicken out, is to do 335 pounds with a straight Olympic bar in good form for 12 reps as you stated you could do with Hulkatrons max deadlift.
If Hulk used straps, I would bet he could do a good 355-360 or somewhere there abouts.