I think the lim is the same only the front nipple is capped cause we dont use a map sensor over here & as fare as the t.b. is concerned garbage. Fully ported they max out to 69mm alot of guys either go with an ls1 t.b. & adaptor plate from mace engineering of go all out with an ADZ u bend with either a 92 or 102mm ss ind bigmouth t.b.Does anyone know anything about the Australian intake manifolds and throttle bodies for the 3800s I’ve read on a few old posts they’re better but can’t find anything explaining the differences. Where would I even get one and is it worth doing?