TKO600 Shift Quality

[Johnjan]

I know this may be tough to articulate because it's a "feel" thing, but I'm trying to determine if my TKO is "feeling" normal. So here goes:

Recently installed a TKO600 in my '68 Camaro and really really like it. The shift from 1st to 2nd though doesn't feel like any manual I've had in the past.

At a very easy, pulling out of the driveway shift from 1 to 2, it feels pretty good and the shifter moves in a fairly straight line from 1 to 2. Driving around town and shifting at higher RPM, say 2000 to 3000, the shifter seems to want to move noticeably to the right when moving from 1 to 2. Not enough to miss a gear, but enough to wonder if it's normal. There is no interference at the floor or console/boot. All other shifts are fine and 3 to 4 is a perfectly straight line.

Is this normal for these transmissions? Could it be the shifter?