V-Gate 2 in-line shifter rods.

I have a 68 baracuda coupe with a Big block and an 833 4 speed with a Dana 60.
I have a V-gate 2 inline shifter but no install kit ( part # 373-8180) from Hurst. Apparently the install kit is no longer available for an a body application, but the b-body one is still available ( part # 373-8182).
This is a Drag car with the stock floor in it but I was wondering if anyone knows how far back the b-body kit would set back my shifter as apposed to the a body one?

Thanks,

Gary