do u want it street legal? do u have emission testing mandated in your area? if u do then u will need to use a emission s friendly cam. u will want to go with 1.6 to 1 rocker arms and high strength pushrods and so long as the computer is tuned for the injectors 37s should work fine. 383 has more torque and any mods u do will add a little more than it would with a 350. keep it.

 

as far as emissions, a 383 can take a slightly bigger cam and still pass emissions.

call lloyd elliott and tell him your goals and he will spec a cam to get you there

 

Emissions is not a factor.

 

if thats the case u can make some good hp with what u have and the right cam. have a look here and give lloyd a call. hope u got roller lifters.
http://www.elliottsportworks.com/lt1.html