Lets see your aftermarket shifters!

Looks like a normal pattern to me, because of the park position being all the way forward and 1st being at the back. (should be right for a normal pattern VB)
I have the Hurst Promatic that uses up and down movements of the stick to get passed the lockouts where yours has the handle.

One thing that is important is to set the shifter in the car and find where you like it to be.
I like to close my eyes and reach down for a shifter and have it be where I feel it should be, then mount it there.

If you don't have the cable for it B&M usually uses the same cable for multiple shifters, so that part might not be a big deal.
I actually used a B&M cable on my Hurst shifter because it fit the cable routing better for my car than the Hurst cable.

You might run across issue's with the trans lever not being the right geometry, because most aftermarkets come with their own specific levers.
Lever geometry has to be spot on or you'll play hell getting the indicator on the shifter to line up with where the lever on the trans is for each gear.
You really don't want to have the shifter say you are in D when the trans is actually half way between 2nd and D, or D and neutral for example.

When installing a cable you have to put a hole in the hump for it, and it's a good idea to use a cable as short as possible.
Nice sweeping curves turning as little corners as possible is a good thing also.

Hope this gives you some food for thought.

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