Please can anyone offer any advice on selecting a tuning package?

Heres my current spec:

1991 red top 4x4
Standard engine/cams
Vibratechnic engine mounts
Group A head gasket
Dark green 803's
T3
GGR K&N Group A cone filter
Mongoose exhaust
RS 500 style intercooler
Uprated breather system
Ahmed Bayoo 330bhp chip and pectal baby board

How much will it cost for new T34, light blues, cam change + remapping?

Whats the safest limit I can take the standard engine too?

Is it best to have a BD10 inlet cam and leave the exhaust cam standard, if not what would you recommend?

I like having a go at 0-60's and 1/4 miles so what would be the best exhaust housing 0.48, 0.55 or 0.63 ?

Whats the safest rev limit for standard engine?

CheeRS

Paul