Bob,

I think Streets was just messing with ya, as he is known to do. I made my estimate based on similar cars I have known. I suggest you try it with and without the slicks, and use the shortest tire you can until you can make the gear swap. Also for long term plans you might think about an overdrive tranny. A 200R4 would give you lower 1st and 2nd gears and then still give you good cruising RPM in OD. They are plenty strong enough as they came in the Turbo Buick Grand Nationals. I suggest the 200R4 instead of the 700 because they are the same length as the T350 and you don't have to cut your shaft or change your yoke.

Pat