The GQ's had a variety of radios fitted to them.
My '91 DX came with separate radio and cassette units in a silver colour.
My Dad's ST30 GQ came with a Clarion am/fm cassette single-DIN unit.
Mine is now fitted with a Pioneer double-DIN touch screen setup, I've abandoned the retro look in favour of tech! 😄
The Blaupunkt you're looking at seems a decent compromise. It gives you the up to date features without too much bling.

 

The single din AM only in mine is fairly basic so I didn't want over crowd the original look but the more I read about these 2 units the more I'm leaning to the BP. I did just find a couple of minutes ago on an American Facebook post in a Toyota 60s series page a couple lads who put the black $140 one in and apparently their not that good. On bloke found the exact same unit elsewhere (temu i think) for $25. So I don't think it's the best option.
My reason to keep it so original looking is because my uncle bought it new in 1989 and had it up until a couple of years ago when he died of brain cancer, auntie didn't really want it so sold it to me cheap. Its become a bit of a family heirloom almost so I'm trying to do best by it and my uncle.

This is an older photo, its now got an ARB bullbar and driving lights, and i think newer tires too.

 

I fully appreciate your love for this old granddad-spec GQ..! My Dad's ST30 was similar, I wanted to keep it but my TD42 DX was simply the better vehicle.
I was just scrolling through the Soundlabs website, they have a retro car radio section, and show the Blaupunkt unit as an option for Nissan/Datsun.

Thats a very nice GQ you have there!

 

Thanks, Soundlabs huh? I'll have to check them out.
Did you prefer the the 4.2l over the 3l or where there other reasons?

 

My last 2 GQ'S I just put a $200 Pioneer radio in with am/fm, usb and Bluetooth. You can change the screen colour to suit which is handy. Replaced speakers but not with something too expensive as I don't need some loud music machine to make me deaf as I still enjoy my hearing.

 

That's fair, im not after huge sound either, just I think if I put cheaper sony 6 inch speakers in the front and middle doors that should be plenty over the current single 36 year old 4 inch speaker. My main issue is just getting the head unit look period correct.

 

I bought the TD42 new in 1991, Dad followed with his 3.0 a few years later.
The 3.0 is quiet and comfortable but underpowered in a Patrol. Insufficient torque.
The TD42 ran rings around it for performance and economy.

 

Damn, I thought the 3.0 would've at least been better on fuel being smaller and newer. He needs to get the 4.8 haha.