MoPar tested the 360/380 engine with a 750 Holley and used 1-3/4 inch headers. If you move to an Edelbrock carb, use the 800.
I use an 800 Edelbrock on my 10.5-1 - 340 with a 241@050 XE-HL from Comp cams.
Use the 750 Edelbrock on the big Fury. My stock long block 5.9 uses the 750 Edelbrock. It also has the RPM-AG and 1-3/4 headers, 727/2500 & 3.55 on 245/60/15’s. Chrome box ignition on a JY vacuum advance distributor.
A Nice package for pirating it out of a wrecked Durango.
The Holley DP’s are nice with higher gear ratio and manual transmissions or with a very loose converter & higher gear ratios.