Ok I have finished my thinking it really would not be hard now I have thought about it to run an IFs on a streetjam
The STJ front chassis has the 2 countersunk holes at the front that we would just need a small carbon plate 1-1.5mm thick bolted to it for the droop screw, that's it..... It has all the required holes and we would just use the Streetjam Servo mount for the rear upper arm pivot point as with the current STJ front suspension.
Only issue I see would be keeping the extra plates secure so if they were hit would not twist but as they sit above the chassis would not be too big of an issue.
I can see me ordering some parts once I get paid this month