not trying to hi jack this thread but I was going to post a similar one today anyways .. I have 6sp manual BF MkII F6 with 383rwkw & it looks like the slave cylinder is cactus .. only just put a Mal Wood Opt 6 clutch in 2000kms ago & that was the 2nd time Ive replaced in the clutch the car too .. so im a bit over the mainual thing at the moment looking at options & $$ to convert to an auto box that will handle that power & maybe a lil more .. low 400kws .. will give good street & strip performance but mostly be reliable .. my box only has 50,000kms on it & as I said the clutch is basically brand new & when its removed I'll replace the cylinder so I can sell the box .. have heard C4, powerglide or a Turbo 400 are the way to go .. just want to compare costs & performance of the three .. car does not spend much time on the street, its not my daily .. cheers in advance