now its a 383, advice?

If you use light forged pistons (expensive, but needed) you could use stock rods, shot peened, with good bolts. Honestly, look at a 440Source B wedge 3.75 stroke kit... It will be cheaper in the long run. The CNC heads are about $800 more than the stock RPMs, so if you are buying heads, it's not much more. You'll spend a bunch on making the iron flow decently, and they are still heavy. So if budget is the restraint, then build the lower end as you need it, and then use stuff you can afford on the top, planning to change later. And simply accept it runs what it runs until you can get it all together properly for that ET.

edit.. another thought would be Stealths CNCd. They are cheaper but dont get as good a result. You'll be replacing the springs and retainers/locks anyway. Maxxed out, they might move enough air to make the numbers.