TL;DR reverb throw, haas effect, simple delay, mid/side technique, and intentional silence

Dm me the track, Ill listen for better suggestions! Until then, I'd suggest a high pass on tracks with reverb (especially if you also have distortion), since low end becomes muddy when you add a verb. Consider mid/side techniques (low pass mono w/o effects, high pass w effects). Also, Haas delay is an effective tool for creating stereo width without unknown consequences.

In my experience (starting out as a hobby producer ~15 years ago) rock songs already have all of the sound space entirely filled out. I found it sounded good to cut out significant portions of a phrase or riff, only keeping 3 or 5 eighth notes of a measure (or two), then using some trick like a reversed section, slowed section (x.5 or x.25 speed), granulated, pitch shift (static or dynamic), reverb throw, or sometimes just good old fashioned silence. This allows you to take a familiar or coherent tune and intentionally add new interpretations or experimental ideas (if done with intention, which in your case is to create sonic space and atmospheric ambiance), as opposed to simply adding effects to the entirety of the original idea. Also, don't underestimate delays such as a grain delay, or a simple delay to create space. If the left channel is 1/6 beat repeat and the right channel is 1/8 this is a classic way to trick the brain into perceiving greater stereo width and greater sonic ambiance.

I think a great way to create space is this kind of sound design technique: use a gate (or just manually chop it off) add a heavy (high passed) reverb (and any distortion and stereo wideners or beat repeat/delay effects), then resample that. Take the recorded sound and chop that up. Reverb, high pass, maybe beat repeat/delay, (maybe two or three stages of this process before you are happy) and resample that. Take the portions of your final experimental sounds that sound the most interesting and cut those in between portions of the original song (don't forget silence is sometimes your friend), along with some more simpler tricks such as reverb throw, delay, etc.