SHORT n SWEET
+1y
There's really only one way to cut the sides, I cut around one inch from the pinch seams...
it is the firewall and back wall of cab that is up to you...
On the back wall of the cab I cut 3 inches out of the indented part (it is half way up the back wall, can't miss it)
then on the firewall I cut 3 inches out on top of the trans tunnel and then straight down to the easiest part to rejoin, you will also see that...
I cut the whole sides of the firewall off and rebuilt it with trailer tubs and sheetmetal, it looks way cleaner and I can lay sill on 20's...
I can get proper photo's if you need more help...
GOOD LUCK!