When thinking back to the start of projects, there have been more than a few times when I thought the easiest (fastest) way to " get her done" was to work with what's already there.
That approach has bitten me in the rear too many times, changing my way of thinking. Besides it's false economy because even after working around and beyond the job at hand you can bet going backwards later to fix something (even minor) will take more time and money than making it proper in the first place.
In Laurents' KVA build, as words of advice only, is to put the car up on stands, pull the engine and transaxle, along with the coilovers. Next level the chassis and block the tires up to simulate ground clearance at ride height. Then a much clearer picture (and access to do work) will be seen.
It appear chassis tubes in conflict with the suspension, making no sense. Inverting the transaxle solves the driveshaft angles and will require changes to the engine and transaxle mounts ( although those mounts would have to changed regardless).
Starting with a clean sheet of paper so to speak, will save umpteen work arounds - ultimately cost less and make a much better car.
Insert last line of post #24 here.
Cheers
Ian