How many degrees b4 top dead centre for a 355?

[5.0L VS Ute]

hey lads. Would any1 know how many degrees b4 top dead i have 2 set the dizzy for my 355? the bloke i bought it off had it running like a **** and it needs to be timed and tuned. cheers

 

[XMY308]

My hq holden ute has a 308 MSD ignition & believe it or not it runs at 18 degrees advanced.Dont know why asked a lot of questions. Depends on how much work it has i spose