Duster 383 cooling issue

What compression is it. Give us more details. I would bump the timing up a few degree’s if it can handle it. Kim
488 ci the only cheap part on the whole car is the water pump and thermostat it has
eagle crank
Eagle rods
Ross forged dished pistons
Child’s and Albert molly rings
Billet main caps
Melling oil pump
Moroso chrome pan
Crain 1.5 gold rockers and shaft
Mopar performance housing
Molly push rods
Crane timing chain and gear
906 heads ported and milled 025
New stainless 2.14 in and 1.74 ex valves
Comp double valve springs
Ics copper O ring head gasket
All arp bolts
Was balanced and blueprinted 9.5 compression with the 3-2 barrel carb set up but I’m running a 850 Holley