I have AFR 190cc aluminum heads with 68cc chambers on my GM replacement 350. I originally used an Edelbrock Performer intake with an Edelbrock 650cfm carb. Ran good but not what I expected. I switched to an Edelbrock RPM Air Gap and a Holley 770cfm Street Avenger. MAJOR difference. Runs very strong yet cruises well with no bad manners.
As to running a 327 versus a 383; definitely go with the 383! You will not be disapointed.