Machine shop could find nothing and did as was suggested to the block and heads and all seemed straight so here we go again (BTW I bought the manifold brand new last year)

Manifold is on, I got some edelbrock intake gaskets this time, so far no leaks, (fingers crossed).

Now I can get it started, but she won't stay running long enough for me to check timing or anything. She'll fire up, sound real healthy, then rev up to about 15-2000 RPM's and shut off.

To me this sounds like a vacuum leak somewhere, but I could be wrong as I can't find any lines not hooked up anywhere

What else could be causing this?

So close to having my truck back, must get fixed