Heinrich,
Only one thing bothers me with your setup. The placement of your actuators. You have them mounted basicly, where the top of the seats will be once your seats are in place. Unless you are shorter than about 5-9, your seats will be back about as far as you can get them, unless you mount them way forward. If you made your seats lower than the actuators, then your head will be hitting them. Not a good idea from a saftey standpoint. I would sugggest three locations other than where you have them be considered.
1. If the angle you have them mounted, is the ideal angle, and the lenght of the throw is right. consider lenghtening the arms and mount the actuators as close to the doors as possible. You might even consider a cutout of the door so they can be mouunted there. there is about 3-6 inches of space that can be utilized over the tank sils.
2. If the throw lenght can be altered, mount them directly straight down from their overhead location point so that they are actually between the seats. They might even be staggered in their placement so they can be close together or overlaped. You should have about 4" to work with. If you go for the traditional GT 40 seats, then consider shortening the lenght of the arms of the actuators so that they mount high on the firewall just under the window. They may have to be enclosed as that is in line with your head in a side impact.
2. You might even consider a longer arm to mount them just above the center console(could stagger and overlap here as well). Then you could build an enclosure to actually hide them. The arms could be anodised in a smoky grey or black to let them blend in, or powder coat the exposed lenght of the arms in the closed position.
Once you get your seats and console in, you will see how tight or close things are.:furious::idea:
Just a thought!!
Bill