What are these holes in the manifold? - The AMC Forum - Page 1
1960-1969 All Makes All Models Parts | 9819B | 1960-69 Ford/Mercury; 144/170/200 6-Cylinder; Heat-Riser Choke Tube; Mustang/Ranchero/Falcon | Classic Industries
Choke Heat Tube -
Long Warm Up Times - caused by rusted plate where heat tube mounts to intake manifold | Jeep Enthusiast Forums