The manifold is rigid. It can work and not leak even with a missing bolt.
Put a flat washer on the bolt that goes on the cracked ear.
Fill the crack with anti-seize so you don't see it.
From what I have read if you braze or weld it and it cracks it won't be the braze or weld that cracks it will be next to it.
I had to put a long bolt in the rear dip stick tube then grab it with vice grips. It was tighter than hell.
You won't know if the oil pickup for the shorter 1/4" drive oil pump will work until you try to install the oil pan.
The 144 and the 5/16" drive oil pump 200's don't use the same oil pickup.
The oil screen may sit directly on the bottom of the pan or worse.
One guy "Mark" gave up on his 78 200 install in his daughters car when he couldn't get the oil pan on.
It was the last straw. He had a running older 200 that he installed.
I think he was too cheap to buy a 65 200 oil pump pickup for a job he was doing for free.
Put a flat washer on the bolt that goes on the cracked ear.
Fill the crack with anti-seize so you don't see it.
From what I have read if you braze or weld it and it cracks it won't be the braze or weld that cracks it will be next to it.
I had to put a long bolt in the rear dip stick tube then grab it with vice grips. It was tighter than hell.
You won't know if the oil pickup for the shorter 1/4" drive oil pump will work until you try to install the oil pan.
The 144 and the 5/16" drive oil pump 200's don't use the same oil pickup.
The oil screen may sit directly on the bottom of the pan or worse.
One guy "Mark" gave up on his 78 200 install in his daughters car when he couldn't get the oil pan on.
It was the last straw. He had a running older 200 that he installed.
I think he was too cheap to buy a 65 200 oil pump pickup for a job he was doing for free.