My intake manifold leaks like a sieve

Operator error

I had the engine professionally built and it ran fine for 50k miles

Decided to put on some new heads so I grabbed a set from junkyard and had machine shop work them over.

Then I installed the fresh heads and now I have this leak.
So the leak is my fault.

There were no alignment pins in the block or manifold when I removed the manifold initially.

I guess I need to go back and ensure I install the alignment sleeves correctly