70-chevy truck-won't stay running.?

flamer

New member
I have a 70 chevy 1/2 ton, just did a motor swap and now I'm having some issues. When I stick in gear it shuts off, I've already check for vacuum leaks and could not find any. If I keep my foot on the pedal it will stay on and go down the road, but as soon as I Iet off, it dies. Also when I go start it the first time it cranks just fine, but after it shuts off it tends to drag and takes a while to start up again.
 
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