I’m working on a 1958 GMC 150 Napco. Truck had a 350 installed and was missing mount on frame for 336. I riveted mount on and am installing 336. Wanted to see if mount I have is correct and complete. Think it might be missing a lower metal “cradle”. See pics below. Hopefully someone can clarify this. Engine is being rebuilt and body is at the shop. I’ll post updates. I’ve completed the chassis. I took everything down to last nut and bolt.
