This is a cool setup! Did you just eye it or did you use a tape measure or something straight that touches all four kingpins?
I got the metal angle square edge sitting off the ground / on a box to ensure the set of bolts sitting through the baseplates were all lined up correctly, same as a counter top in the shop, when we did it there too with other trucks a while back, then checked with the edge (not flat face) of a metal ruler across the four kingpins in the baseplates, put them in different orders too, just to see if there were any inconsistencies and they all lined up every way I tried.
Even measuring axles when the truck is completely assembled, quite often the hanger can sit on an angle or different position depending on bushings, or just not give the true distance because of a number of things, but in this case, it was all about where the kingpins were positioned, not so much the ends of the baseplates. The pivot points all lined up too.
V8 pivot housing sits out further than regular Venture baseplates, but where the pivot cup sits, it is still in the same relative position, as is the kingpin. The back end of the baseplates are also different, with the V8 being a bit shorter, which can also throw off the eye when looking at them, in relation to regular baseplates.
I have some forged baseplate trucks I can also take apart and line up too, just to see, because I am curious about the differences there too.
When I have DIY double drilled Venture forged baseplates, as compared to my DIY double drilled cast baseplates, they sit better on most boards I put them on in the shorter wheelbase position, I guess because the forged baseplates extend the wheelbase a bit, but I think overall it is just down to the concave of the board in relation to the existing bolt holes - if the bolt holes are in a regular position, the V8 option does bring in the trucks a bit too much, but if the bolt holes are in a longer position in relation to the deck / mold of the board, then the V8 position can make that board very nice / easy to pop in relation to where the trucks end up sitting.
Not to make a list of all the decks I have found V8 type baseplates work well on, but anything that has been a lot steeper, even of two comparable decks, same specs but one way steeper than the other, the V8 option works really well on the steep board, but not so well on the mellow board.
I have had them on DLX boards, Polar, Magenta and more from BBS, then some DSM boards like Palace, other woodshops too, usually all with longer than average wheelbases 14.5 and up, but not always. Bringing in an already shortish board with steep kicks with the V8 baseplates really lightens everything right up and makes it a tech wonder - one board that was a blank when I got it, super steep, tried the DIY V8 option and made it so easy for everything, which surprised all of us who skated it.