Well I have nothing to lose except labor LOL got the truck and knew it had a freeze plug bad but well did not see this coming especially in Texas

Anyhow question is how much torque does that side of the block take? Am I in danger of ripping the block in half .

A pic of said damage



I plan on grinding a V and cleaning and either soldering or epoxy fix, being it is only the water jacket not to worried about it just don't have the money right now to replace which I will do in the future.

Could put block sealer in the also just don't like clogging up the radiator with it.

 

The block has to be welded..........soldering, expoy's etc are not going to work

 

That's one hell of a crack if I'm seeing it right!! That's not a sealer type of repair. That needs to be welded or find a different block.

If you are trying to repair it I would drill a small hole at each end of the crack to keep it from spreading. Then grind the bevel in it. Preheat the block, weld it then slowly let it cool.

 

I m afraid that your block is terminal. You could take it apart and do as was suggested, preheat in an oven, weld with nickle rod, return to the oven to post heat and slowly cool, but I get the impression you want to make repairs and keep the engine intact to continue using it. There were 7 million of these built. Finding a good used one isn't that hard. That is where the smart money is.

 

May have to start the search may even get a short block. But it sure will have to be core free LOL

 

That is one NASTY looking crack. I wouldn't want to trust myself to that.
Do you have junk yards around there that you can go diving in?

I was out at one locally this morning and they had about 10 300s in there. Most of them stripped down to the block. All I'd have to do is unhook it from the frame and bring it home. A lot less time and money than trying to repair something that badly damaged.
Most of your cost would probably just be in the gaskets needed to put it back together.