Take it from someone who has painted their whole interior (eveything plastic got painted)
Prep is a must , When I painted my interior I probally spent over 50 alone in prep suplies
2 cans accetone , 3 sleaves each of 220 , 400 grit , 120 grit sanding sponges , rags , 2 rolls masking tape .
And using adhesion promoter is a must , it keeps it from pealing and cracking later on down the line . And u also have to shoot a couple layers of clear ot it will come off anytime something hits it .
As far as the 40-60 mod I used a dremal tool , I cant stress this enough take your time and plan pull off the cover , and look at the passenger seat for where you need to cut the foam , heat up a wire coat hanger it will cut and form the foam after that then you can see where to cut the seat pan . Then put your cover back one and cut and resew it . Mine looks completly stock I had almost 8 inches of space inbetween seats before I built my console .
This is what my interior looks like after about 20 hours of work and around 200 bucks of suplies including the cost of the dremal tool , paint and other stuff . plus 40 for seat covers . Ps I used 3 cans of black duplicolor vynil paint for dash and rear panel . 4 cans of krylon ultra flat Od green for all the plastic parts . 2 cans of krylon clear laquer .
You can see how the seat is contoured like a factory bucket , and the width of the console as a referance .
You can see the color scehme in this one with the black and Od trim .
Heres an idea of what kind of prep your looking at , It was still quicker to tape off everything than to take the dash out .
heres all the panels out while I pain the inside .