In a month or two my project gets transferred to new ownership and I will find myself re-negotiating for my current job. I'm 8ish hours per day 5 days per week

In a month or two my project gets transferred to new ownership and I will find myself re-negotiating for my current job. I'm 8ish hours per day 5 days per week right now. I would love to work 8x4 or 6x5 instead, but new company is full of go-getters and try-hards so I don't think my needs are a great match for their culture.