Blown head gasket

[Trucidatio]

Long story short- Rebuilt top end, put back together, headgasket blew.

I spent the past couple days putting my engine back together. I had the head rebuilt after the timing belt broke.

I put all new parts onto the engine.
Victor rienz gasket set throughout

I got the got the car running. It fired up first shot.
I had a slight overheating issue, which ended up being i switched two coolant lines which ran to the throttle body. I fixed this issue and the overheating issue went away.

I had also adjusted the valves.
The valvetrain did sound a bit noisy, but i chalked that up to it being the m20 and it needing some fresh oil. Which I was going to change right away.

I took the car out and it felt fine and drove well.
I got a couple blocks away when the car started to sound really bad, like a valve was hitting. I babied it home coasting as much as I could. the car would not stay running at this point, but it would run.

Stopped the car, popped the hood and smoke came pouring out. I could see oil quickly draining out of the engine, and found the leak right at #3 cylinder on the passenger side. Pretty heavy oil flow.

What did I do wrong?
How bad is the engine going to be?
what should I do?

[Quadrajet]

Dude. I feel for ya. That really sucks. At this moment, I'm at a loss for words.

[Trucidatio]

Im really afraid that I warped the head. I hope that it was just a bad headgasket, or something.

[MR 325]

Did you have the head checked for cracks and resurfaced while it was off?

Switching the throttle body lines won't make it overheat, the coolant just flows through it.

[SpecM]

Victor rienz gasket set throughout

if the head is crack-free and resurfaced properly, and new head bolts were properly torqued, then this ^ is the problem with the oil leak

[Trucidatio]

I had the head checked and resurfaced. It doesn't look like it would be crAcked as the oil is coming out between the block and the head.