I have a 355 motor that I'm putting a tuned port injection system on from a 1986 Camaro I have a Doug Hebert cam in it
Ad-285/290
D @50 230/235
Lift 488/48
lobe center 108
​​Summit cast iron Heads
2.02
72cc
165cc
​​​1.6 roller rockers
My question is will I be able a tune the computer to work with the cam I have already without changing it?

 

I would swap it out to a computer compatible cam with a Lobe seperation angle of at least 112 or higher and a little bit less duration, Keep it under 220.

 

Since the '86 TPI system uses a MAF, it is probably going to be a lot more forgiving. It should at least run respectably until the pedal hits the floor. At that point some tuning will probably be in order - Especially with those large-chambered heads.