Probably a stupid question, but I'm running LS2 heads (unported) on an LS1 engine, and I notice the LS2 monaro/GTO runs a bunch less advance...assumedly due to more efficient heads. The spark map is something I've really neglected as I just haven't had my car on a dyno, but is there any harm in trying out the LS2 high octane spark map? I'm assuming not unless I'm missing some effect from a different table since detonation should be less likely. I notice it is a slightly larger table, but the relevant bit fits perfectly. The LS2 doesn't seem to have a base spark table, so I would massage that (and the idle region) to check there's nothing too disjointed there.
I realise I really should pay to get the spark map done on a dyno, but it's hard to justify at the moment, and I'm tempted to one day get better heads...
X-air OTRCAI, no MAF
102mm Nick Williams TB
FAST LSXR
AAS medium-length 1.75" headers into dual 2.5" Wortec cat-back (no cats)
222/226-115+3 .6"/.6" EPS cam