Given the specs you have provided, and your very tall rear tires, I think you need something in the 4:30 or 4:56 range.

As for 10's.........how hot is this 6? I think that 10's would be overly optimistic. I'm thinking more like the 13-14 second range, if everything is right. I have a pretty well built 460 Ford that I am thinking about slipping into a little drag altered some day, and the 10 second bracket is what I would be shooting for and happy with using that engine. It takes some serious HP to get a car down the track in that range. I know some racers have built 6's to run strong, but it takes a lot of work to get them there.

JMO,

Don