Spitfire Ignition Timing ???

["Brad Kahler" <Brad.Kahler@141.com>]

I'm trying to set the timing on my Mk1 Spitfire and can seem to 
decifer the pointer on the timing chain cover.  How do you know where 
4 or 5 degrees BTC is ??  The haynes manual is useless and so is 
cylmers.  Can anyone help me out on this?

TIA


Brad

1964 Spitfire4            BFC25720L (After 10 years will be on the road in 
March!!!)
1966 TR4A                CT72398L (Needs Restoration)
1951 Dodge Truck    82217766  B-3-B-108 (Boxes & Boxes of parts right now)