T55 Oil pressure shock absorber rear axle swap…against?

Hello, here forum newcomer. I have not found any clear answer to my question in another thread and can’t get any further: My shock absorbers on the rear axle are there, oil pressure. T55, 2.0 Bj 96. Now I find everywhere only gas pressure for the rear axle and also no hint that back oil pressure is standard or recommended. My autobastler (no Volvo specialist) that the Ar*** of my Volvo would be on the floor if he installed the with gas pressure that I order I also find only oil pressure dampers for front. What now? Bzw. can you make the gas pressure dampers suitable?! Questions at a high level 😉 Thank you for your help!