I'll be honest and say I don't know what the innards look like as I didn't;t take ,much notice.
But if your Quadras have 7" of room for it then you should be fine.
An alternative is to get a better fork in the long run. They're not cheap springs if you're importing to the UK.
I assume they are identical to the Judy springs you get since both used the Jaxs MCU setup
I do plan to get a 80mm front fork eventually, but the bike has a tange threaded headset right now and I would rather just rebuild the Quadra until it really dies and I have to get something better. I do singletrack and XC so dont need a ton of travel. Also I live in the US so shipping shouldnt be an issue.
1994 Univega Alpina 5.5 -- 1997 Giant ATX 970 -- 1995 Specialized Stumpjumper FSR -- 2011 Diamondback Response hardtail -- 1988 Schwinn Prologue -- 2007 Litespeed Niota -- 1986 Benotto Modelo 1500 SS/Fixed --