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sorry to say that was my same issue. seems general rule has been go wide body and get 345/35/18 MT to hook that kind of power on the street. I am running toyo 315/35/18 and they can only hook from 60 mph and up. They do hook good on a well preped track.
I run the MT's sometimes and although they are better than a regular street tire I was hoping for better traction. They wont hold your power in 1st for sure and probably not most of 2nd either. I think the only answer is to regulate the foot, or go down in wheel size.
I run 305/35/18s with almost 100 less horsepower and they won't hold 1st at full pressure on the street. 2nd will spin sometimes depending on the temperature and road surface. That said, they hook up WAY better than any street tire.
They're also perfectly safe for occasional wet weather driving if the necessity arises.
I run the 305/35/18's too and they are about the best you can get tractionwise unless you drop wheel diameter to get more sidewall. They did well for me at ~725 RWHP but hooking first and most of second with them on the street is not going to happen. I think the 19's would do well for you at that power level. Expect ~6-7k miles out of a pair.