van 14bff , whats the spring perch spacing???

[55Willy]

I'm getting a 68 burb and I was wondering if it would be easier to use a regular 14bff and move the mounts or get a van width, but I can't remember what spaceing the vans used,

anyone wanna help?

 

[u2slow]

Van perch width is 50" iirc.