Hello this is my first post and I guess you may think an odd question. I.E I want less not more!

I have a 463 series G Wagen with a 603 engine. I’m considering a 606 conversion but my priorities are simplicity over out right power. Despite what some may say even the factory 606 turbo G Wagens suffer from high under bonnet temperatures and I use my G Wagen for overland trips in to Africa.

I’ve driven a normally aspirated 606 engined G Wagen and it ticked all the boxes for me. Drove way better than my 603, and a relatively simple conversion.

So to get to my question.
Does the turbo 606 have the same compression ratio as the normally aspirated?

The reason I ask is that 606 turbo’s are very common and cheap in the UK as well as being newer than the available normally aspirated ones.

So the plan would be. Get a 606 turbo, ditch the turbo and replace the injection pump with my mechanical 603 pump.

Thoughts appreciated.