what you need to do, if you want some help, is post a few pics of what you have. a pic of the inside of the truck showing the actual shifter and it's location relative to the seat and dash, then one of the underside where you could show a pic of the side view of the actual transmission from the driver's side so we can see the outline of the trans and also the location of any levers and rods on the trans if it is not a designated "truck" trans that has the shifter going into the top of the transmission.
here is what a "truck" trans looks like. notice the shifter handle goes right into the top of the transmission
https://www.jeepfan.com/tech/jeeptec...D-gm-sm420.htm
here is what a muncie car trans looks like, I know, its not an actual transmission but you can see the difference between a truck trans and a car trans pretty well and also how the two different shifter arrangements make it easy to figure out what style of trans you have
https://www.flatpyramid.com/3d-model...-transmission/