Landracing.com - Home is where the most LSR folks hang out. There is an ECTA section on there and the folks that run the show post up there very often.
Get a rule book and ask questions. I don't know if the new SCTA tire rule affects ECTA but if it does you will need race rubber. If not, stock ZR rated rubber is fine. I 2nd the non-shinko suggestion (don't know if you have one or not).
Safety wire both sides of the front axle, the pinch bolts, some folks do the caliper bolts and fork tube pinch bolts but I don't think you have to. The '08 has a locknut on the rear axle instead of a castle nut so you should drill and pin it or drill and wire it. Some LSR events also require you to safety wire the oil fill cap, oil drain plug, and oil filter but again, check the rule book to be sure. Not a bad idea to drill and wire that stuff anyway (use a hose clamp on the oil filter and wire to that).
ummmm let's see. you will need a kill switch lanyard (you probably already have one). You *might* need fireproof covering on the fuel lines but that might be an SCTA thing. you got the coolant deal covered... ummmmm.... Check the req's on leathers. SCTA is all cow all the time (no holes). ECTA is probably more allowing of cooling on the leathers. You need leather gloves, boots, etc. Also check the requirements on the 1 piece vs. two piece leathers and what the zipper requirement is for the two piece.
Oh the metal battery hold down (lots of ways to do this).
As for what speed? anywhere from 125-200
No way to know but everyone usually goes out there thinking they are going to run 200 and they disheartened to run 168 or whatever. If you are an accomplished racer, you will do well. A mile goes by quick though. Bring a selection of sprockets and a laptop for tuning if you have a wideband setup on it.
LSR folks will help you with anything. If you get stuck, resist the urge to pack it up and turn to whomever is next to you and ask "hey do you have a generator and an EZ UP?" (oh yeah, bring shade) and they'll likely have it and happily lend it or share with you.