Thread: Manifold Warped???

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I had a 318 that had the heads planed to run on propane. The intake surfaces were planed at the wrong angle, no way to seal them.

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