Nope...I have the fan switch in the lower hose with the Saab thing, gauge bulb is in the head under the stat, and an air bleed tapped into the top of stat housing
Your intake manifold is different than mine, maybe use the fitting meant for heater line as fill point, and leave gauge as is?
I wouldn't like the gauge as you have it, much better info if it's on the "hot" side of the circuit. Maybe put that adapter I mentioned in the upper hose where you now fill, and put the temp gauge there? Then you can fill thru pump.
My car is a 85, sure different from yours. You have a diagonal brace under the carbs, mine is on left side. My steering column is farther outboard than yours -goes between clutch and brake pedals- and the header is really close to the block, inboard of the diagonal.
As to rad location, mine came with it against that crossmember and a real crappy pusher fan. Now it's forward just enough to slip a sucker fan between it and frame. The important thing is ducting in front, making sure all the air HAS to go thru rad.